#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string s;
  s = "";
  for (int i = 1; i <= n; i++) {
    if (i <= 9)
      s.push_back(i + '0');
    else {
      string s1 = "";
      int p = i;
      while (p != 0) {
        int r = p % 10;
        s1.push_back(r + '0');
        p = p / 10;
      }
      reverse(s1.begin(), s1.end());
      s += s1;
    }
  }
  cout << s[n - 1];
}
