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 int a, b, c, d, e, n, x, y, a1[200005], a2[200005];
char c1, c2, c3, c4;
string s1, s2, s3, s4, cikti = "NO", s[105];
int main() {
  cin >> n;
  int bla = 1;
  while (s1.size() <= n) {
    s1 += to_string(bla);
    ++bla;
  }
  cout << s1[n - 1] << "\n";
  return 0;
}
