#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
  int n;
  cin >> n;
  if (n % 10 < 5)
    cout << n / 10 * 10;
  else
    cout << (n / 10 + 1) * 10;
}
