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;
long long n, x;
int main() {
  scanf("%lld", &n);
  x = 9;
  for (int i = 1;; n -= i++ * x, x *= 10)
    if (n <= i * x) {
      for (x = x / 9 + --n / i; ++n % i; x /= 10)
        ;
      return printf("%lld\n", x % 10), 0;
    }
  return 0;
}
