#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize "-O3"
const int N = (3e2 + 5);
const int64_t MOD = (1e9 + 9);
int n, k;
string s;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  cin >> k;
  while (s.length() <= k) s += to_string(++n);
  cout << s[k - 1] << '\n';
  return 0;
}

### Prompt

In cpp, your task is to solve 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;
#pragma GCC optimize "-O3"
const int N = (3e2 + 5);
const int64_t MOD = (1e9 + 9);
int n, k;
string s;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  cin >> k;
  while (s.length() <= k) s += to_string(++n);
  cout << s[k - 1] << '\n';
  return 0;
}

```