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 k;
int main() {
  scanf("%lld", &k);
  long long now = 9, cnt = 1;
  while (k > 0) {
    k -= now * cnt;
    now *= 10;
    ++cnt;
  }
  now /= 10;
  --cnt;
  k += now * cnt;
  long long a = k / cnt, b = k % cnt, c = 1;
  int i = 1;
  while (i < cnt) {
    c *= 10;
    ++i;
  }
  if (b == 0) {
    b = cnt;
    --a;
  }
  c += a;
  i = 1;
  while (i <= cnt - b) {
    c /= 10;
    ++i;
  }
  c %= 10;
  printf("%lld", c);
  return 0;
}
