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() {
  int k, p = 9, s = 9, dig = 1;
  cin >> k;
  while (k > s) {
    k = k - s;
    dig++;
    p = 10 * p;
    s = p * dig;
  }
  p = p / 10;
  int d = p / 10;
  while (d != 0) {
    p = p + d;
    d = d / 10;
  }
  int num = 0, rem = 0;
  if (k % dig == 0)
    num = p + (k / dig);
  else {
    num = p + (k / dig) + 1;
    rem = k % dig;
  }
  if (rem == 0)
    cout << num % 10 << endl;
  else {
    int ans = 0;
    for (int i = 0; i < dig - rem; i++) {
      num = num / 10;
      ans = num % 10;
    }
    cout << ans << endl;
  }
  return 0;
}
