#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string str = "";
  for (int i = 1; i <= 10000; i++) {
    str = str + to_string(i);
  }
  cout << str[n - 1] << endl;
  return 0;
}

### Prompt

Your challenge is to write a CPP solution 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() {
  int n;
  cin >> n;
  string str = "";
  for (int i = 1; i <= 10000; i++) {
    str = str + to_string(i);
  }
  cout << str[n - 1] << endl;
  return 0;
}

```