#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int t = 1;
  for (int j = 1; j <= t; j++) {
    int n, a = 0, b;
    cin >> n;
    string str;
    while (str.size() <= n + 1) {
      str = str + to_string(a);
      a++;
    }
    cout << str[n];
  }
  return 0;
}

### Prompt

Please create a solution in cpp to the following problem:

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

### Response

```cpp
#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int t = 1;
  for (int j = 1; j <= t; j++) {
    int n, a = 0, b;
    cin >> n;
    string str;
    while (str.size() <= n + 1) {
      str = str + to_string(a);
      a++;
    }
    cout << str[n];
  }
  return 0;
}

```