We have a sequence of length N consisting of non-negative integers. Consider performing the following operation on this sequence until the largest element in this sequence becomes N-1 or smaller. (The operation is the same as the one in Problem D.)

* Determine the largest element in the sequence (if there is more than one, choose one). Decrease the value of this element by N, and increase each of the other elements by 1.



It can be proved that the largest element in the sequence becomes N-1 or smaller after a finite number of operations.

You are given the sequence a_i. Find the number of times we will perform the above operation.

Constraints

* 2 ≤ N ≤ 50
* 0 ≤ a_i ≤ 10^{16} + 1000

Input

Input is given from Standard Input in the following format:


N
a_1 a_2 ... a_N


Output

Print the number of times the operation will be performed.

Examples

Input

4
3 3 3 3


Output

0


Input

3
1 0 3


Output

1


Input

2
2 2


Output

2


Input

7
27 0 0 0 0 0 0


Output

3


Input

10
1000 193 256 777 0 1 1192 1234567891011 48 425


Output

1234567894848
import java.io.*;

import static java.lang.Math.*;
import static java.lang.Math.min;

import java.math.BigDecimal;
import java.util.*;

import static java.util.Arrays.*;

import java.util.stream.*;

/**
 * @author baito
 */
@SuppressWarnings("unchecked")
public class Main {
    static boolean DEBUG = true;
    static StringBuilder sb = new StringBuilder();
    static int INF = (int) 1e9 + 100;
    static int MINF = (int) -1e9 - 100;
    static long LINF = (long) 1e18 + 100;
    static long MLINF = (long) -1e18 - 100;
    static int MOD = (int) 1e9 + 7;
    static double EPS = 1e-10;
    static int[] y4 = {-1, 1, 0, 0};
    static int[] x4 = {0, 0, -1, 1};
    static int[] y8 = {0, 1, 0, -1, -1, 1, 1, -1};
    static int[] x8 = {1, 0, -1, 0, 1, -1, 1, -1};
    static boolean[] isPrime;
    static ArrayList<Integer> primes;
    static char[][] S;
    static long maxRes = Long.MIN_VALUE;
    static long minRes = Long.MAX_VALUE;
    static long[] fac, finv, inv;

    static int N;
    static long[] A;

    public static void solve() throws Exception {
        //longを忘れるなオーバーフローするぞ

        N = ni();
        A = nla(N);
        long cou = 0;
        SegmentAdd s = new SegmentAdd(A);
        if (s.max(0, N) < N) {
            System.out.println("0");
            return;
        }
        int lim = (int) 2e4;
        //とりあえずlimまで減らす
        while (true) {
            if (s.max(0, N) <= lim) break;
            int maxi = s.maxi(0, N);
            long v = s.sum(maxi, maxi + 1);
            long kai = (v - lim) / N + 10;
            s.add(maxi, maxi + 1, -kai - (kai * N));
            s.add(0, N, kai);
            cou += kai;
        }
        while (s.max(0, N) >= N) {
            int maxi = s.maxi(0, N);
            s.add(0, N, 1);
            s.add(maxi, maxi + 1, -N - 1);
            cou++;
        }
        System.out.println(cou);
    }

    static class SegmentAdd {
        int n;
        long[] sum, min, max, lazy;
        int[] mini, maxi;

        SegmentAdd(int size) {
            n = 1;
            while (n < size) n *= 2;
            sum = new long[2 * n - 1];
            min = new long[2 * n - 1];
            max = new long[2 * n - 1];
            lazy = new long[2 * n - 1];
            mini = new int[2 * n - 1];
            maxi = new int[2 * n - 1];
            Arrays.fill(min, Long.MAX_VALUE);
            Arrays.fill(max, Long.MIN_VALUE);
            for (int i = 0; i < n; i++) {
                mini[i + n - 1] = i;
                maxi[i + n - 1] = i;
            }
            for (int i = 0; i < size; i++) {
                update(i, 0);
            }
        }

        SegmentAdd(int[] a) {
            this(a.length);
            for (int i = 0; i < a.length; i++) {
                update(i, a[i]);
            }
        }

        SegmentAdd(long[] a) {
            this(a.length);
            for (int i = 0; i < a.length; i++) {
                update(i, a[i]);
            }
        }

        public void update(int i, long x) {
            i += n - 1;
            sum[i] = x;
            min[i] = x;
            max[i] = x;
            while (i > 0) {
                i = (i - 1) / 2;
                sum[i] = sum[i * 2 + 1] + sum[i * 2 + 2];
                setMinMax(i);
            }
        }

        public void add(int l, int r, long x) {
            add(l, r, 0, x, 0, n);
        }

        public void add(int a, int b, int k, long x, int l, int r) {
            eval(k, l, r);
            if (r <= a || b <= l) return;
            else if (a <= l && r <= b) {
                lazy[k] += x;
                eval(k, l, r);
            } else {
                add(a, b, k * 2 + 1, x, l, (l + r) / 2);
                add(a, b, k * 2 + 2, x, (l + r) / 2, r);
                sum[k] = sum[k * 2 + 1] + sum[k * 2 + 2];
                setMinMax(k);
            }
        }

        public long sum(int l, int r) {
            return sum(l, r, 0, 0, n);
        }

        public long sum(int a, int b, int k, int l, int r) {
            eval(k, l, r);
            if (r <= a || b <= l) return 0;
            else if (a <= l && r <= b) {
                return sum[k];
            } else {
                long lv = sum(a, b, k * 2 + 1, l, (l + r) / 2);
                long rv = sum(a, b, k * 2 + 2, (l + r) / 2, r);
                return lv + rv;
            }
        }

        public long min(int l, int r) {
            return min(l, r, 0, 0, n);
        }

        public long min(int a, int b, int k, int l, int r) {
            eval(k, l, r);
            if (r <= a || b <= l) return Integer.MAX_VALUE;
            else if (a <= l && r <= b) {
                return min[k];
            } else {
                long lv = min(a, b, k * 2 + 1, l, (l + r) / 2);
                long rv = min(a, b, k * 2 + 2, (l + r) / 2, r);
                return Math.min(lv, rv);
            }
        }

        public int mini(int l, int r) {
            return mini(l, r, 0, 0, n);
        }

        public int mini(int a, int b, int k, int l, int r) {
            eval(k, l, r);
            if (r <= a || b <= l) return -1;
            else if (a <= l && r <= b) {
                return mini[k];
            } else {
                long lv = min(a, b, k * 2 + 1, l, (l + r) / 2);
                long rv = min(a, b, k * 2 + 2, (l + r) / 2, r);
                int li = mini(a, b, k * 2 + 1, l, (l + r) / 2);
                int ri = mini(a, b, k * 2 + 2, (l + r) / 2, r);
                return lv < rv ? li : ri;
            }
        }

        public long max(int l, int r) {
            return max(l, r, 0, 0, n);
        }

        public long max(int a, int b, int k, int l, int r) {
            eval(k, l, r);
            if (r <= a || b <= l) return Integer.MIN_VALUE;
            else if (a <= l && r <= b) {
                return max[k];
            } else {
                long lv = max(a, b, k * 2 + 1, l, (l + r) / 2);
                long rv = max(a, b, k * 2 + 2, (l + r) / 2, r);
                return Math.max(lv, rv);
            }
        }

        public int maxi(int l, int r) {
            return maxi(l, r, 0, 0, n);
        }

        public int maxi(int a, int b, int k, int l, int r) {
            eval(k, l, r);
            if (r <= a || b <= l) return -1;
            else if (a <= l && r <= b) {
                return maxi[k];
            } else {
                long lv = max(a, b, k * 2 + 1, l, (l + r) / 2);
                long rv = max(a, b, k * 2 + 2, (l + r) / 2, r);
                int li = maxi(a, b, k * 2 + 1, l, (l + r) / 2);
                int ri = maxi(a, b, k * 2 + 2, (l + r) / 2, r);
                return lv > rv ? li : ri;
            }
        }


        private void eval(int k, int l, int r) {
            if (lazy[k] != 0) {
                sum[k] += lazy[k] * (r - l);
                min[k] += lazy[k];
                max[k] += lazy[k];
                if (r - l > 1) {
                    lazy[k * 2 + 1] += lazy[k];
                    lazy[k * 2 + 2] += lazy[k];
                }
                lazy[k] = 0;
            }
        }

        private void setMinMax(int i) {
            if (min[i * 2 + 1] <= min[i * 2 + 2]) {
                min[i] = min[i * 2 + 1];
                mini[i] = mini[i * 2 + 1];
            } else {
                min[i] = min[i * 2 + 2];
                mini[i] = mini[i * 2 + 2];
            }
            if (max[i * 2 + 1] >= max[i * 2 + 2]) {
                max[i] = max[i * 2 + 1];
                maxi[i] = maxi[i * 2 + 1];
            } else {
                max[i] = max[i * 2 + 2];
                maxi[i] = maxi[i * 2 + 2];
            }
        }

    }

    public static boolean calc(long va) {
        //貪欲にギリギリセーフを選んでいく。
        int v = (int) va;
        return true;
    }

    //条件を満たす最大値、あるいは最小値を求める
    static int mgr(long ok, long ng) {
        //int ok = 0; //解が存在する
        //int ng = N; //解が存在しない
        while (Math.abs(ok - ng) > 1) {
            long mid;
            if (ok < 0 && ng > 0 || ok > 0 && ng < 0) mid = (ok + ng) / 2;
            else mid = ok + (ng - ok) / 2;

            if (calc(mid)) {
                ok = mid;
            } else {
                ng = mid;
            }
        }
        if (calc(ok)) return (int) ok;
        else return -1;
    }

    static <T> void initStreamArray(ArrayList<T>[] a, int n) {
        a = Stream.generate(ArrayList::new).limit(n).toArray(ArrayList[]::new);
    }

    //消す候補
    static ArrayList<Integer> divisors(int n) {
        ArrayList<Integer> res = new ArrayList<>();
        for (int i = 1; i <= Math.sqrt(n); i++) {
            if (n % i == 0) {
                res.add(i);
                if (i != n / i) res.add(n / i);
            }
        }
        return res;
    }

    static ArrayList<Long> divisors(long n) {
        ArrayList<Long> res = new ArrayList<>();
        for (long i = 1; i <= Math.sqrt(n); i++) {
            if (n % i == 0) {
                res.add(i);
                if (i != n / i) res.add(n / i);
            }
        }
        return res;
    }

    static ArrayList<Integer> factorization(int n) {
        if (primes == null) setPrimes();
        ArrayList<Integer> fact = new ArrayList<>();
        for (int p : primes) {
            if (n % p == 0) fact.add(p);
            while (n % p == 0) n /= p;
            if (n == 1) break;
        }
        if (n != 1) fact.add(n);
        return fact;
    }

    boolean equal(double a, double b) {
        return a == 0 ? abs(b) < EPS : abs((a - b) / a) < EPS;
    }

    public static void chMax(long v) {
        maxRes = Math.max(maxRes, v);
    }

    public static void chMin(long v) {
        minRes = Math.min(minRes, v);
    }

    //便利系
    //左端、右端の情報をもたせる。半開区間
    public static void setLR(int[] a, ArrayList<Integer> l, ArrayList<Integer> r) {
        for (int i = 0; i < a.length; i++) {
            if (a[i] > 0) {
                int j = i;
                while (a[j] > 0) j++;
                l.add(i);
                r.add(j);
                i = j - 1;
            }
        }
    }

    public static long[] rui(int[] a) {
        long[] res = new long[a.length + 1];
        for (int i = 0; i < a.length; i++) {
            res[i + 1] = a[i];
        }
        for (int i = 0; i < a.length; i++) {
            res[i + 1] += res[i];
        }
        return res;
    }

    //p[i].nowx := i番目に小さいｖの値 p[i].nowy := その個数
    //0個の物は除く
    public static P[] mato(int[] a) {
        CouMap map = new CouMap(a);
        P[] res = new P[map.size()];
        int i = 0;
        for (Map.Entry<Long, Long> m : map.map.entrySet()) {
            res[i++] = new P((int) (long) m.getKey(), (int) (long) m.getValue());
        }
        sort(res);
        return res;
    }

    public static int[] imosu(int[] f, int[] t, int n) {
        int[] imosu = new int[n + 1];
        for (int i = 0; i < f.length; i++) {
            imosu[f[i]]++;
            imosu[t[i] + 1]--;
        }
        for (int i = 0; i < n; i++) {
            imosu[i + 1] += imosu[i];
        }
        return imosu;
    }

    static int[] inverse(int[] a) {
        int[] res = new int[a.length];
        for (int i = 0; i < a.length; i++)
            res[a[i]] = i;
        return res;
    }

    public static String notE(double v) {
        return BigDecimal.valueOf(v).toPlainString();
    }

    public static void print(char[][] a) {
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[0].length; j++) {
                System.out.print(a[i][j]);
            }
            System.out.println("");
        }
    }

    public static void print(int[][] a) {
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[0].length; j++) {
                System.out.print(a[i][j] + " ");
            }
            System.out.println("");
        }
    }

    public static <T> void print(ArrayList<T> a) {
        for (T t : a) {
            System.out.println(t);
        }
    }

    public static void print(int[] a) {
        for (int i = 0; i < a.length; i++)
            System.out.println(a[i]);
    }

    public static void print(long[] a) {
        for (int i = 0; i < a.length; i++)
            System.out.println(a[i]);
    }

    //bit関連
    public static boolean bget(BitSet bit, int keta) {
        return bit.nextSetBit(keta) == keta;
    }

    public static boolean bget(long bit, int keta) {
        return ((bit >> keta) & 1) == 1;
    }

    public static int bget3(long bit, int keta) {
        bit /= (long) pow(3, keta);
        return (int) (bit % 3);
    }

    public static int getHashA(long key) {
        return (int) (key >> 32);
    }

    public static int getHashB(long key) {
        return (int) (key & -1);
    }

    //正の数のみ
    public static long getHashKey(int a, int b) {
        return (long) a << 32 | b;
    }
    //数学関係--------------------------------

    //a/bを返す
    public static long ceil(long a, long b) {
        return (a % b == 0) ? a / b : a / b + 1;
    }

    public static double sqrt(double v) {
        return Math.sqrt(v);
    }

    public static long sqrt(long v) {
        long res = (long) Math.sqrt(v);
        while (res * res > v) res--;
        return res;
    }

    static double[][] PER_DP;

    static double ncrPer(int n, int r) {
        if (n < r) return 0;
        if (PER_DP == null) {
            PER_DP = new double[5001][5001];
            PER_DP[0][0] = 1;
            for (int ni = 0; ni < PER_DP.length - 1; ni++) {
                for (int ri = 0; ri < ni + 1; ri++) {
                    PER_DP[ni + 1][ri] += PER_DP[ni][ri] / 2;
                    PER_DP[ni + 1][ri + 1] += PER_DP[ni][ri] / 2;
                }
            }
        }
        return PER_DP[n][r];
    }

    //mod関連
    public static int mod(long a, int m) {
        return (int) ((a % m + m) % m);
    }

    static void setMod() {
        fac = new long[(int) 1e6 + 1000];
        finv = new long[(int) 1e6 + 1000];
        inv = new long[(int) 1e6 + 1000];
        fac[0] = fac[1] = 1;
        finv[0] = finv[1] = 1;
        inv[1] = 1;
        for (int i = 2; i < 1e6 + 1000; i++) {
            fac[i] = mMul(fac[i - 1], i);
            inv[i] = MOD - mMul(inv[MOD % i], (MOD / i));
            finv[i] = mMul(finv[i - 1], inv[i]);
        }
    }

    static int mNcr(int n, int r) {
        if (n < 0 || r < 0 || n < r) return 0;
        int result = mMul(fac[n], finv[n - r]);
        result = mMul(result, finv[r]);
        return result;
    }

    public static int mSum(long a, long b) {
        return (int) (((a % MOD + b % MOD) % MOD + MOD) % MOD);
    }

    public static int mDiff(long a, long b) {
        return mSum(a, -b);
    }

    public static int mMul(long a, long b) {
        return (int) (((a % MOD * b % MOD) % MOD + MOD) % MOD);
    }

    public static int mDiv(long a, long b) {
        return mMul(a, mInv(b));
    }

    public static long mSums(long... lar) {
        long res = 0;
        for (long l : lar)
            res = (res + l % MOD) % MOD;
        return (res + MOD) % MOD;
    }

    public static long mDiffs(long... lar) {
        long res = lar[0] % MOD;
        for (int i = 1; i < lar.length; i++) {
            res = (res - lar[i] % MOD) % MOD;
        }
        return (res + MOD) % MOD;
    }

    public static long mMuls(long... lar) {
        long res = 1;
        for (long l : lar)
            res = (res * (l % MOD)) % MOD;
        return (res + MOD) % MOD;
    }

    public static long mDivs(long... lar) {
        long res = lar[0] % MOD;
        for (int i = 1; i < lar.length; i++) {
            res = mMul(res, mInv(lar[i]));
        }
        return (res + MOD) % MOD;
    }

    static long mInv(long n) {
        return mPow(n, MOD - 2);
    }

    static int mPow(long x, long n) {
        long res = 1L;
        while (n > 0) {
            if ((n & 1) == 1) {
                res = res * x % MOD;
            }
            x = x * x % MOD;
            n >>= 1;
        }
        return (int) ((res + MOD) % MOD);
    }

    //↑nCrをmod計算するために必要
    static long lcm(long n, long r) {
        return n / gcd(n, r) * r;
    }

    static int gcd(int n, int r) {
        return r == 0 ? n : gcd(r, n % r);
    }

    static long gcd(long n, long r) {
        return r == 0 ? n : gcd(r, n % r);
    }

    public static int u0(int a) {
        if (a < 0) return 0;
        return a;
    }

    public static long u0(long a) {
        if (a < 0) return 0;
        return a;
    }

    public static double u0(double a) {
        if (a < 0) return 0;
        return a;
    }

    public static boolean[][] tbt(char[][] s, char c) {
        boolean[][] res = new boolean[s.length][s[0].length];
        for (int hi = 0; hi < s.length; hi++)
            for (int wi = 0; wi < s[0].length; wi++)
                if (s[hi][wi] == c) res[hi][wi] = true;
        return res;
    }

    public static int[] tia(int a) {
        int[] res = new int[keta(a)];
        for (int i = res.length - 1; i >= 0; i--) {
            res[i] = a % 10;
            a /= 10;
        }
        return res;
    }

    public static int[][] tit(char[][] a) {
        int[][] res = new int[a.length][a[0].length];
        for (int hi = 0; hi < a.length; hi++) {
            for (int wi = 0; wi < a[0].length; wi++) {
                res[hi][wi] = a[hi][wi] - '0';
            }
        }
        return res;
    }

    public static Integer[] toIntegerArray(int[] ar) {
        Integer[] res = new Integer[ar.length];
        for (int i = 0; i < ar.length; i++) {
            res[i] = ar[i];
        }
        return res;
    }

    //k個の次の組み合わせをビットで返す 大きさに上限はない 110110 -> 111001
    public static long bitNextComb(long comb) {
        long x = comb & -comb; //最下位の1
        long y = comb + x; //連続した下の1を繰り上がらせる
        return ((comb & ~y) / x >> 1) | y;
    }

    public static int keta(long num) {
        int res = 0;
        while (num > 0) {
            num /= 10;
            res++;
        }
        return res;
    }

    public static int ketaSum(long num) {
        int res = 0;
        while (num > 0) {
            res += num % 10;
            num /= 10;
        }
        return res;
    }

    public static boolean isOutofIndex(int x, int y, int w, int h) {
        if (x < 0 || y < 0) return true;
        if (w <= x || h <= y) return true;
        return false;
    }

    public static boolean isOutofIndex(int x, int y, char[][] ban) {
        if (x < 0 || y < 0) return true;
        if (ban[0].length <= x || ban.length <= y) return true;
        return false;
    }


    public static void setPrimes() {
        int n = 100001;
        isPrime = new boolean[n];
        Arrays.fill(isPrime, true);
        isPrime[0] = isPrime[1] = false;
        for (int i = 2; i * i <= n; i++) {
            if (!isPrime[i]) continue;
            for (int j = i * 2; j < n; j += i) {
                isPrime[j] = false;
            }
        }
        primes = new ArrayList<>();
        for (int i = 2; i < n; i++) {
            if (isPrime[i]) primes.add(i);
        }
    }

    public static void revSort(int[] a) {
        Arrays.sort(a);
        reverse(a);
    }

    public static void revSort(long[] a) {
        Arrays.sort(a);
        reverse(a);
    }

    public static P[] clone(P[] ar) {
        P[] res = new P[ar.length];
        for (int i = 0; i < ar.length; i++) {
            res[i] = new P(ar[i].x, ar[i].y);
        }
        return res;
    }

    public static int[][] clone(int[][] ar) {
        int[][] nr = new int[ar.length][ar[0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = ar[i].clone();
        return nr;
    }

    public static long[][] clone(long[][] ar) {
        long[][] nr = new long[ar.length][ar[0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = ar[i].clone();
        return nr;
    }

    public static double[][] clone(double[][] ar) {
        double[][] nr = new double[ar.length][ar[0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = ar[i].clone();
        return nr;
    }

    public static boolean[][] clone(boolean[][] ar) {
        boolean[][] nr = new boolean[ar.length][ar[0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = ar[i].clone();
        return nr;
    }

    public static char[][] clone(char[][] ar) {
        char[][] nr = new char[ar.length][ar[0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = ar[i].clone();
        return nr;
    }

    public static int[][][] clone(int[][][] ar) {
        int[][][] nr = new int[ar.length][ar[0].length][ar[0][0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = clone(ar[i]);
        return nr;
    }

    public static long[][][] clone(long[][][] ar) {
        long[][][] nr = new long[ar.length][ar[0].length][ar[0][0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = clone(ar[i]);
        return nr;
    }

    public static double[][][] clone(double[][][] ar) {
        double[][][] nr = new double[ar.length][ar[0].length][ar[0][0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = clone(ar[i]);
        return nr;
    }

    public static boolean[][][] clone(boolean[][][] ar) {
        boolean[][][] nr = new boolean[ar.length][ar[0].length][ar[0][0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = clone(ar[i]);
        return nr;
    }

    public static char[][][] clone(char[][][] ar) {
        char[][][] nr = new char[ar.length][ar[0].length][ar[0][0].length];
        for (int i = 0; i < ar.length; i++)
            nr[i] = clone(ar[i]);
        return nr;
    }

    /**
     * <h1>指定した値以上の先頭のインデクスを返す</h1>
     * <p>配列要素が０のときは、０が返る。</p>
     *
     * @return<b>int</b> ： 探索した値以上で、先頭になるインデクス
     * 値が無ければ、挿入できる最小のインデックス
     */
    public static <T extends Number> int lowerBound(final List<T> lis, final T value) {
        int low = 0;
        int high = lis.size();
        int mid;

        while (low < high) {
            mid = ((high - low) >>> 1) + low;    //(low + high) / 2 (オーバーフロー対策)
            if (lis.get(mid).doubleValue() < value.doubleValue()) {
                low = mid + 1;
            } else {
                high = mid;
            }
        }
        return low;
    }

    //v未満で最大のiを返す。ただしv以上を満たすiがあるなら最小のiを返す
    public static <T extends Number> int rlowerBound(final List<T> lis, final T value) {
        int ind = lowerBound(lis, value);
        if (ind == lis.size() || !lis.get(ind).equals(value)) ind--;
        return ind;
    }

    /**
     * <h1>指定した値より大きい先頭のインデクスを返す</h1>
     * <p>配列要素が０のときは、０が返る。</p>
     *
     * @return<b>int</b> ： 探索した値より上で、先頭になるインデクス
     * 値が無ければ、挿入できる最小のインデックス
     */
    public static <T extends Number> int upperBound(final List<T> lis, final T value) {
        int low = 0;
        int high = lis.size();
        int mid;
        while (low < high) {
            mid = ((high - low) >>> 1) + low;    //(low + high) / 2 (オーバーフロー対策)
            if (lis.get(mid).doubleValue() < value.doubleValue()) {
                low = mid + 1;
            } else {
                high = mid;
            }
        }
        return low;
    }

    public static int lowerBound(final int[] arr, final int value) {
        int low = 0;
        int high = arr.length;
        int mid;

        while (low < high) {
            mid = ((high - low) >>> 1) + low;    //(low + high) / 2 (オーバーフロー対策)
            if (arr[mid] < value) {
                low = mid + 1;
            } else {
                high = mid;
            }
        }
        return low;
    }

    public static int rlowerBound(final int[] arr, final int value) {
        int ind = lowerBound(arr, value);
        if (ind == arr.length || arr[ind] != value) ind--;
        return ind;
    }


    public static int upperBound(final int[] arr, final int value) {
        int low = 0;
        int high = arr.length;
        int mid;
        while (low < high) {
            mid = ((high - low) >>> 1) + low;    //(low + high) / 2 (オーバーフロー対策)
            if (arr[mid] <= value) {
                low = mid + 1;
            } else {
                high = mid;
            }
        }
        return low;
    }

    public static int lowerBound(final long[] arr, final long value) {
        int low = 0;
        int high = arr.length;
        int mid;
        while (low < high) {
            mid = ((high - low) >>> 1) + low;    //(low + high) / 2 (オーバーフロー対策)
            if (arr[mid] < value) {
                low = mid + 1;
            } else {
                high = mid;
            }
        }
        return low;
    }

    public static int rlowerBound(final long[] arr, final long value) {
        int ind = lowerBound(arr, value);
        if (ind == arr.length || arr[ind] != value) ind--;
        return ind;
    }

    public static int upperBound(final long[] arr, final long value) {
        int low = 0;
        int high = arr.length;
        int mid;
        while (low < high) {
            mid = ((high - low) >>> 1) + low;    //(low + high) / 2 (オーバーフロー対策)
            if (arr[mid] <= value) {
                low = mid + 1;
            } else {
                high = mid;
            }
        }
        return low;
    }

    //次の順列に書き換える、最大値ならfalseを返す
    public static boolean nextPermutation(int A[]) {
        int len = A.length;
        int pos = len - 2;
        for (; pos >= 0; pos--) {
            if (A[pos] < A[pos + 1]) break;
        }
        if (pos == -1) return false;
        //posより大きい最小の数を二分探索
        int ok = pos + 1;
        int ng = len;
        while (Math.abs(ng - ok) > 1) {
            int mid = (ok + ng) / 2;
            if (A[mid] > A[pos]) ok = mid;
            else ng = mid;
        }
        swap(A, pos, ok);
        reverse(A, pos + 1, len - 1);
        return true;
    }

    //次の順列に書き換える、最小値ならfalseを返す
    public static boolean prevPermutation(int A[]) {
        int len = A.length;
        int pos = len - 2;
        for (; pos >= 0; pos--) {
            if (A[pos] > A[pos + 1]) break;
        }
        if (pos == -1) return false;
        //posより小さい最大の数を二分探索
        int ok = pos + 1;
        int ng = len;
        while (Math.abs(ng - ok) > 1) {
            int mid = (ok + ng) / 2;
            if (A[mid] < A[pos]) ok = mid;
            else ng = mid;
        }
        swap(A, pos, ok);
        reverse(A, pos + 1, len - 1);
        return true;
    }

    static <T> void swap(T[] x, int i, int j) {
        T t = x[i];
        x[i] = x[j];
        x[j] = t;
    }

    static void swap(char[] x, int i, int j) {
        char t = x[i];
        x[i] = x[j];
        x[j] = t;
    }

    static void swap(int[] x, int i, int j) {
        int t = x[i];
        x[i] = x[j];
        x[j] = t;
    }

    public static String reverse(String a) {
        sb.append(a);
        String res = sb.reverse().toString();
        sb.setLength(0);
        return new String(res);
    }

    public static void reverse(int[] x) {
        int l = 0;
        int r = x.length - 1;
        while (l < r) {
            int temp = x[l];
            x[l] = x[r];
            x[r] = temp;
            l++;
            r--;
        }
    }

    public static void reverse(long[] x) {
        int l = 0;
        int r = x.length - 1;
        while (l < r) {
            long temp = x[l];
            x[l] = x[r];
            x[r] = temp;
            l++;
            r--;
        }
    }

    public static void reverse(char[] x) {
        int l = 0;
        int r = x.length - 1;
        while (l < r) {
            char temp = x[l];
            x[l] = x[r];
            x[r] = temp;
            l++;
            r--;
        }
    }

    public static void reverse(int[] x, int s, int e) {
        int l = s;
        int r = e;
        while (l < r) {
            int temp = x[l];
            x[l] = x[r];
            x[r] = temp;
            l++;
            r--;
        }
    }

    static int cou(boolean[] a) {
        int res = 0;
        for (boolean b : a) {
            if (b) res++;
        }
        return res;
    }

    static int cou(boolean[][] a) {
        int res = 0;
        for (boolean[] b : a) {
            res += cou(b);
        }
        return res;
    }

    static int cou(String s, char c) {
        int res = 0;
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) == c) res++;
        }
        return res;
    }

    static int cou(char[][] a, char c) {
        int co = 0;
        for (int i = 0; i < a.length; i++)
            for (int j = 0; j < a[0].length; j++)
                if (a[i][j] == c) co++;
        return co;
    }

    static int cou(int[] a, int key) {
        int co = 0;
        for (int i = 0; i < a.length; i++)
            if (a[i] == key) co++;
        return co;
    }

    static int cou(long[] a, long key) {
        int co = 0;
        for (int i = 0; i < a.length; i++)
            if (a[i] == key) co++;
        return co;
    }

    static int cou(int[][] a, int key) {
        int co = 0;
        for (int i = 0; i < a.length; i++)
            co += (cou(a[i], key));
        return co;
    }

    static int[] couArray(int[] a) {
        int[] res = new int[maxs(a) + 1];
        for (int i : a) {
            res[i]++;
        }
        return res;
    }

    static void fill(int[] a, int v) {
        Arrays.fill(a, v);
    }

    static void fill(long[] a, long v) {
        Arrays.fill(a, v);
    }

    static void fill(boolean[] a, boolean v) {
        Arrays.fill(a, v);
    }

    static void fill(int[][] a, int v) {
        for (int i = 0; i < a.length; i++)
            Arrays.fill(a[i], v);
    }

    static void fill(char[][] a, char c) {
        for (int i = 0; i < a.length; i++)
            Arrays.fill(a[i], c);
    }

    static void fill(long[][] a, long v) {
        for (int i = 0; i < a.length; i++)
            Arrays.fill(a[i], v);
    }

    static void fill(double[][] a, double v) {
        for (int i = 0; i < a.length; i++)
            Arrays.fill(a[i], v);
    }

    static void fill(boolean[][] a, boolean v) {
        for (int i = 0; i < a.length; i++)
            Arrays.fill(a[i], v);
    }

    static void fill(int[][][] a, int v) {
        for (int i = 0; i < a.length; i++)
            fill(a[i], v);
    }

    static void fill(long[][][] a, long v) {
        for (int i = 0; i < a.length; i++)
            fill(a[i], v);
    }

    static int maxs(int... a) {
        int res = Integer.MIN_VALUE;
        for (int i : a) {
            res = Math.max(res, i);
        }
        return res;
    }

    static long maxs(long... a) {
        long res = Long.MIN_VALUE;
        for (long i : a) {
            res = Math.max(res, i);
        }
        return res;
    }

    static double maxs(double... a) {
        double res = Double.MIN_VALUE;
        for (double i : a) {
            res = Math.max(res, i);
        }
        return res;
    }

    static long mins(long... a) {
        long res = Long.MAX_VALUE;
        for (long i : a) {
            res = Math.min(res, i);
        }
        return res;
    }

    static int maxs(int[][] ar) {
        int res = Integer.MIN_VALUE;
        for (int i[] : ar)
            res = Math.max(res, maxs(i));
        return res;
    }

    static long maxs(long[][] ar) {
        long res = Integer.MIN_VALUE;
        for (long i[] : ar)
            res = Math.max(res, maxs(i));
        return res;
    }

    static int mins(int... a) {
        int res = Integer.MAX_VALUE;
        for (int i : a) {
            res = Math.min(res, i);
        }
        return res;
    }


    static int mins(int[][] ar) {
        int res = Integer.MAX_VALUE;
        for (int i[] : ar)
            res = Math.min(res, mins(i));
        return res;
    }

    public static <T extends Number> long sum(ArrayList<T> lis) {
        long res = 0;
        for (T li : lis) {
            res += li.longValue();
        }
        return res;
    }

    static long sum(int[] a) {
        long cou = 0;
        for (int i : a)
            cou += i;
        return cou;
    }

    static long sum(long[] a) {
        long cou = 0;
        for (long i : a)
            cou += i;
        return cou;
    }


//FastScanner

    static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    static StringTokenizer tokenizer = null;

    public static String next() {
        if (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }

    public static String nextLine() {
        if (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                return reader.readLine();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }

        return tokenizer.nextToken("\n");
    }

    public static long nl() {
        return Long.parseLong(next());
    }

    public static String n() {
        return next();
    }

    public static int ni() {
        return Integer.parseInt(next());
    }

    public static double nd() {
        return Double.parseDouble(next());
    }

    public static int[] nia(int n) {
        int[] a = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = ni();
        }
        return a;
    }

    //1-index
    public static int[] niao(int n) {
        int[] a = new int[n + 1];
        for (int i = 1; i < n + 1; i++) {
            a[i] = ni();
        }
        return a;
    }

    //番兵法
    public static int[] nias(int n, int end) {
        int[] a = new int[n + 1];
        for (int i = 0; i < n; i++) {
            a[i] = ni();
        }
        a[n] = end;
        return a;
    }

    public static int[] niad(int n) {
        int[] a = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = ni() - 1;
        }
        return a;
    }

    public static P[] npa(int n) {
        P[] p = new P[n];
        for (int i = 0; i < n; i++) {
            p[i] = new P(ni(), ni());
        }
        return p;
    }

    public static P[] npad(int n) {
        P[] p = new P[n];
        for (int i = 0; i < n; i++) {
            p[i] = new P(ni() - 1, ni() - 1);
        }
        return p;
    }

    public static int[][] nit(int h, int w) {
        int[][] a = new int[h][w];
        for (int hi = 0; hi < h; hi++) {
            for (int wi = 0; wi < w; wi++) {
                a[hi][wi] = ni();
            }
        }
        return a;
    }

    public static int[][] nitd(int h, int w) {
        int[][] a = new int[h][w];
        for (int hi = 0; hi < h; hi++) {
            for (int wi = 0; wi < w; wi++) {
                a[hi][wi] = ni() - 1;
            }
        }
        return a;
    }

    static int[][] S_ARRAY;
    static long[][] S_LARRAY;
    static int S_INDEX;
    static int S_LINDEX;

    //複数の配列を受け取る
    public static int[] niah(int n, int k) throws Exception {
        if (S_ARRAY == null) {
            S_ARRAY = new int[k][n];
            for (int j = 0; j < n; j++) {
                for (int i = 0; i < k; i++) {
                    S_ARRAY[i][j] = ni();
                }
            }
        }
        return S_ARRAY[S_INDEX++];
    }

    public static long[] nlah(int n, int k) throws Exception {
        if (S_LARRAY == null) {
            S_LARRAY = new long[k][n];
            for (int j = 0; j < n; j++) {
                for (int i = 0; i < k; i++) {
                    S_LARRAY[i][j] = nl();
                }
            }
        }
        return S_LARRAY[S_LINDEX++];
    }

    //複数の配列を受け取る
    public static int[] niahd(int n, int k) throws Exception {
        if (S_ARRAY == null) {
            S_ARRAY = new int[k][n];
            for (int j = 0; j < n; j++) {
                for (int i = 0; i < k; i++) {
                    S_ARRAY[i][j] = ni() - 1;
                }
            }
        }
        return S_ARRAY[S_INDEX++];
    }

    public static long[] nlahd(int n, int k) throws Exception {
        if (S_LARRAY == null) {
            S_LARRAY = new long[k][n];
            for (int j = 0; j < n; j++) {
                for (int i = 0; i < k; i++) {
                    S_LARRAY[i][j] = nl() - 1;
                }
            }
        }
        return S_LARRAY[S_LINDEX++];
    }

    public static char[] nca() {
        char[] a = next().toCharArray();
        return a;
    }


    public static String[] nsa(int n) {
        String[] res = new String[n];
        for (int i = 0; i < n; i++) {
            res[i] = n();
        }
        return res;
    }

    //スペースが入っている場合
    public static char[][] ncts(int h, int w) {
        char[][] a = new char[h][w];
        for (int hi = 0; hi < h; hi++) {
            String s = nextLine().replace(" ", "");
            for (int wi = 0; wi < s.length(); wi++) {
                a[hi][wi] = s.charAt(wi);
            }
        }
        return a;
    }

    public static char[][] nct(int h, int w) {
        char[][] a = new char[h][w];
        for (int hi = 0; hi < h; hi++) {
            String s = nextLine();
            for (int wi = 0; wi < s.length(); wi++) {
                a[hi][wi] = s.charAt(wi);
            }
        }
        return a;
    }

    public static char[][] nctp(int h, int w, char c) {
        char[][] a = new char[h + 2][w + 2];
        for (int hi = 1; hi < h + 1; hi++) {
            String s = nextLine();
            for (int wi = 1; wi < s.length() + 1; wi++) {
                a[hi][wi] = s.charAt(wi - 1);
            }
        }
        for (int wi = 0; wi < w + 2; wi++)
            a[0][wi] = a[h + 1][wi] = c;
        for (int hi = 0; hi < h + 2; hi++)
            a[hi][0] = a[hi][w + 1] = c;
        return a;
    }

    //スペースが入ってる時用
    public static char[][] nctsp(int h, int w, char c) {
        char[][] a = new char[h + 2][w + 2];
        //char c = '*';
        int i;
        for (i = 0; i < w + 2; i++)
            a[0][i] = c;
        for (i = 1; i < h + 1; i++) {
            a[i] = (c + nextLine().replace(" ", "") + c).toCharArray();
        }
        for (i = 0; i < w + 2; i++)
            a[h + 1][i] = c;
        return a;
    }

    public static long[] nla(int n) {
        long[] a = new long[n];
        for (int i = 0; i < n; i++) {
            a[i] = nl();
        }
        return a;
    }

    public static long[] nlas(int n, long e) {
        long[] a = new long[n + 1];
        for (int i = 0; i < n; i++) {
            a[i] = nl();
        }
        a[n] = e;
        return a;
    }

    public static long[] nlao(int n) {
        long[] a = new long[n + 1];
        for (int i = 0; i < n; i++) {
            a[i + 1] = nl();
        }
        return a;
    }

    public static long[] nlad(int n) {
        long[] a = new long[n];
        for (int i = 0; i < n; i++) {
            a[i] = nl() - 1;
        }
        return a;
    }

    public static long[][] nlt(int h, int w) {
        long[][] a = new long[h][w];
        for (int hi = 0; hi < h; hi++) {
            for (int wi = 0; wi < w; wi++) {
                a[hi][wi] = nl();
            }
        }
        return a;
    }

    //便利クラス
    static class CouMap {
        public HashMap<Long, Long> map;
        public HashMap<String, Long> smap;

        CouMap() {
            map = new HashMap();
            smap = new HashMap();
        }

        CouMap(int[] a) {
            map = new HashMap();
            smap = new HashMap();
            for (int i : a) {
                put(i);
            }
        }

        public int size() {
            return map.size();
        }

        public void put(long key, long value) {
            Long nowValue = map.get(key);
            map.put(key, nowValue == null ? value : nowValue + value);
        }

        public void put(String key, long value) {
            Long nowValue = smap.get(key);
            smap.put(key, nowValue == null ? value : nowValue + value);
        }

        public void mput(long key, long value) {
            Long nowValue = map.get(key);
            map.put(key, nowValue == null ? value % MOD : mSum(nowValue, value));
        }

        public void put(long key) {
            put(key, 1);
        }

        public void put(String key) {
            put(key, 1);
        }

        public void put(int... arg) {
            for (int i : arg) {
                put(i, 1);
            }
        }

        public void put(long... arg) {
            for (long i : arg) {
                put(i, 1);
            }
        }

        public void mput(int... arg) {
            for (int i : arg) {
                mput(i, 1);
            }
        }

        public void mput(long... arg) {
            for (long i : arg) {
                mput(i, 1);
            }
        }

        public long get(long key) {
            Long v = map.get(key);
            return v == null ? 0 : v;
        }

        public long get(String key) {
            Long v = map.get(key);
            return v == null ? 0 : v;
        }
    }

    static class P implements Comparable<P> {
        int x, y;

        @Override
        public int compareTo(P p) {
            //xyで昇順
            return x == p.x ? y - p.y : x - p.x;
            //xyで降順
            //return (nowx == p.nowx ? nowy - p.nowy : nowx - p.nowx) * -1;
            //yxで昇順
            //return nowy == p.nowy ? nowx - p.nowx : nowy - p.nowy;
            //yxで昇順
            //return (nowy == p.nowy ? nowx - p.nowx : nowy - p.nowy) * -1;

            //x昇 y降
            //return nowx == p.nowx ? p.nowy - nowy : nowx - p.nowx;
            //x降 y昇
            //return (nowx == p.nowx ? p.nowy - nowy : nowx - p.nowx) * -1;
            //y昇 x降
            //return nowy == p.nowy ? p.nowx - nowx : nowy - p.nowy;
            //y降 x昇
            //return (nowy == p.nowy ? p.nowx - nowx : nowy - p.nowy) * -1;
        }

        P(int a, int b) {
            x = a;
            y = b;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (!(o instanceof P)) return false;
            P p = (P) o;
            return x == p.x && y == p.y;
        }

        @Override
        public int hashCode() {
            return Objects.hash(x, y);
        }

    }

    static class PL implements Comparable<PL> {
        long x, y;

        public int compareTo(PL p) {
            //xyで昇順
            long res = x == p.x ? y - p.y : x - p.x;
            //xyで降順
            //long res = (nowx == p.nowx ? nowy - p.nowy : nowx - p.nowx) * -1;
            //yxで昇順
            //long res = nowy == p.nowy ? nowx - p.nowx : nowy - p.nowy;
            //yxで昇順
            //long res = (nowy == p.nowy ? nowx - p.nowx : nowy - p.nowy) * -1;

            //x昇 y降
            //long res = nowx == p.nowx ? p.nowy - nowy : nowx - p.nowx;
            //x降 y昇
            //long res = (nowx == p.nowx ? p.nowy - nowy : nowx - p.nowx) * -1;
            //y昇 x降
            //long res = nowy == p.nowy ? p.nowx - nowx : nowy - p.nowy;
            //y降 x昇
            //long res = (nowy == p.nowy ? p.nowx - nowx : nowy - p.nowy) * -1;

            return (res == 0) ? 0 : res > 0 ? 1 : -1;
        }

        PL(long a, long b) {
            x = a;
            y = b;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (!(o instanceof PL)) return false;
            PL p = (PL) o;
            return x == p.x && y == p.y;
        }

        @Override
        public int hashCode() {
            return Objects.hash(x, y);
        }

    }

    //値を渡す際は半開区間
    static class RectangleSum {
        //半開区間 0は0
        long[][] rui;
        int H, W;

        RectangleSum(long[][] ori) {
            H = ori.length;
            W = ori[0].length;
            rui = new long[H + 1][W + 1];
            for (int hi = 0; hi < H; hi++) {
                for (int wi = 0; wi < W; wi++) {
                    rui[hi + 1][wi + 1] = ori[hi][wi];
                }
            }
            for (int hi = 1; hi < H + 1; hi++) {
                for (int wi = 1; wi < W + 1; wi++) {
                    rui[hi][wi] += rui[hi - 1][wi];
                    rui[hi][wi] += rui[hi][wi - 1];
                    rui[hi][wi] -= rui[hi - 1][wi - 1];
                }
            }
        }

        RectangleSum(int[][] ori) {
            H = ori.length;
            W = ori[0].length;
            rui = new long[H + 1][W + 1];
            for (int hi = 0; hi < H; hi++) {
                for (int wi = 0; wi < W; wi++) {
                    rui[hi + 1][wi + 1] = ori[hi][wi];
                }
            }
            for (int hi = 1; hi < H + 1; hi++) {
                for (int wi = 1; wi < W + 1; wi++) {
                    rui[hi][wi] += rui[hi - 1][wi];
                    rui[hi][wi] += rui[hi][wi - 1];
                    rui[hi][wi] -= rui[hi - 1][wi - 1];
                }
            }
        }

        //半開区間
        public long getSum(int left, int right, int top, int bottom) {
            if (right > W || bottom > H) return 0;
            if (left < 0 || top < 0) return 0;
            if (top >= bottom || left >= right) return 0;
            long res = rui[bottom][right];
            res -= rui[top][right];
            res -= rui[bottom][left];
            res += rui[top][left];
            return res;
        }

    }

    public static void main(String[] args) throws Exception {
        long startTime = System.currentTimeMillis();
        solve();
        System.out.flush();
        long endTime = System.currentTimeMillis();
        if (DEBUG) System.err.println(endTime - startTime);
    }

}
