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() {
  int n, i, j;
  string s = "";
  cin >> n;
  for (i = 1; i <= n; i++) {
    string t = "";
    int q = i;
    while (q != 0) {
      t = char((q % 10) + '0') + t;
      q /= 10;
    }
    s += t;
  }
  cout << s[n - 1];
  return 0;
}
