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 n;
  cin >> n;
  long long size = 1, tmp = 9, min = 1;
  while (1) {
    if (size * tmp < n) {
      n -= size * tmp;
      size++;
      tmp *= 10;
      min *= 10;
    } else {
      long long ans = min + (n - 1) / size;
      n = (n - 1) % size;
      string s = to_string(ans);
      cout << s[n];
      return 0;
    }
  }
}
