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 cd(int n) { return floor(log10(n) + 1); }
int main() {
  int n, j, cnt = 0;
  cin >> n;
  for (j = 1;; j++) {
    cnt = cnt + cd(j);
    if (cnt >= n) {
      if (cnt == n) {
        cout << j % 10;
        return 0;
      } else {
        while (cnt != n) {
          --cnt;
          j = j / 10;
        }
        cout << j % 10;
        return 0;
      }
    }
  }
}
