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;
const int maxn = 2e5 + 10;
const double eps = 1e-10;
int main() {
  long long k;
  scanf("%lld", &k);
  long long sta = 9, c = 1, l = 0;
  while (k - sta * c >= 0) k -= sta * c, sta *= 10, c++, l = l * 10 + 9;
  l += k / c;
  if (k % c) {
    l++;
    int g = c - k % c;
    while (g--) l /= 10;
    printf("%lld\n", l % 10);
  } else
    printf("%lld\n", l % 10);
}
