#include <bits/stdc++.h>
using namespace std;
vector<long long int> v;
void solve(long long int a) {
  long long int a2 = a;
  long long int co = floor(log10(a) + 1);
  while (co) {
    a2 /= pow(10, co - 1);
    v.push_back(a2 % 10);
    co--;
    a2 = a;
  }
}
int main() {
  long long int n;
  cin >> n;
  v.push_back(0);
  for (long long int i = 1; i <= 1200000; i++) {
    solve(i);
  }
  cout << v[n];
}
