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;
int main() {
  long long int k;
  cin >> k;
  string s1;
  long long int x = 9;
  long long int j;
  if (k < 10) {
    cout << k;
    return 0;
  }
  for (j = 1; x < k; j++) {
    long long int z = x;
    x = x + (9 * (j + 1) * pow(10, j));
    if (x > k) {
      x = z;
      break;
    }
  }
  long long int i = pow(10, j);
  long long int z, y, r, q;
  if (k == x) {
    s1 = to_string(i - 1);
    cout << s1[j - 1];
    return 0;
  }
  z = k - x;
  y = z / (j + 1);
  r = z % (j + 1);
  q = i - 1 + y;
  if (r != 0) {
    q = q + 1;
    s1 = to_string(q);
    cout << s1[r - 1];
  } else {
    s1 = to_string(q);
    cout << s1[j];
  }
}
