#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  int a = n % 10;
  int b = 10 - a;
  (a > b) ? cout << (n + b) << endl : cout << (n - a) << endl;
  return 0;
}
