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>
int main() {
  int32_t n;
  std::cin >> n;
  std::string str = "";
  int32_t cur = 1;
  while (str.size() < n) {
    str += std::to_string(cur);
    cur++;
  }
  std::cout << str[n - 1] << std::endl;
}
