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 n, a = 9, b = 9, c = 1, d, e, cnt;
  string g;
  cin >> n;
  while (n > b * c) {
    n = n - (b * c);
    b = b * 10;
    c++;
  }
  cnt = b / 9 + (n - 1) / c;
  n = (n - 1) % c;
  g = to_string(cnt);
  cout << g[n] << "\n";
}
