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>
char B[10100];
int main() {
  std::ios_base::sync_with_stdio(false);
  for (int i = 1, n = 0; n < 10000; ++i) {
    auto k = std::sprintf(&B[n], "%d", i);
    n += k;
  }
  size_t k;
  std::cin >> k;
  std::cout << B[k - 1];
}
