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;
int main() {
  long long k;
  cin >> k;
  long long val = 9, digit = 1;
  while (k > val * digit) {
    k -= val * digit;
    val *= 10;
    digit += 1;
  }
  val /= 9;
  long long bel = val + (k - 1) / digit;
  for (long long i = digit - 1 - (k - 1) % digit; i--;) {
    bel /= 10;
  }
  cout << bel % 10;
}
