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;
stack<int> s;
void endNumber(int i) {
  stack<int> temp;
  while (i > 0) {
    temp.push(i % 10);
    i = i / 10;
  }
  int size = temp.size();
  for (int j = 0; j < size; j++) {
    s.push(temp.top());
    temp.pop();
  }
}
int main() {
  int n;
  cin >> n;
  for (int i = 1; s.size() < n; i++) endNumber(i);
  while (s.size() != n) s.pop();
  cout << s.top();
  return 0;
}
