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() {
  long long int k, digit = 1, nine = 9, cnt = 0, angka[20];
  scanf("%lld", &k);
  while (k >= (digit * nine)) {
    k -= (digit * nine);
    digit++;
    cnt += nine;
    nine *= 10;
  }
  cnt += (k / digit);
  k %= digit;
  if (k < 1)
    printf("%lld\n", cnt % 10);
  else {
    cnt++;
    while (digit > 0) {
      angka[digit--] = cnt % 10;
      cnt /= 10;
    }
    printf("%lld\n", angka[k]);
  }
  return 0;
}
