Let's write all the positive integer numbers one after another from 1 without any delimiters (i.e. as a single string). It will be the infinite sequence starting with 123456789101112131415161718192021222324252627282930313233343536...

Your task is to print the k-th digit of this sequence.

Input

The first and only line contains integer k (1 ≤ k ≤ 10000) — the position to process (1-based index).

Output

Print the k-th digit of the resulting infinite sequence.

Examples

Input


7


Output


7


Input


21


Output


5
#include <bits/stdc++.h>
using namespace std;
signed main() {
  long long k, cnt = 9, ws = 1;
  scanf("%lld", &k);
  while (k > cnt * ws) {
    k -= ws * cnt;
    cnt *= 10;
    ws++;
  }
  long long m = k % ws, a = (k - 1) / ws, ans = 1;
  if (m == 0) m = ws;
  for (long long i = 1; i < ws; i++) ans *= 10;
  ans += a;
  for (long long i = 1; i <= (ws - m); i++) ans /= 10;
  printf("%lld", ans % 10);
  return 0;
}
