#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  string s;
  for (int i = 1; i <= n; i++) {
    string str;
    ostringstream temp;
    temp << i;
    s += temp.str();
  }
  cout << s[n - 1] << endl;
}
