#include <bits/stdc++.h>
int in() {
  int r = 0, c;
  for (c = getchar(); c <= 32; c = getchar())
    ;
  if (c == '-') return -in();
  for (; c > 32; r = (r << 1) + (r << 3) + c - '0', c = getchar())
    ;
  return r;
}
using namespace std;
int main() {
  double a;
  cin >> a;
  a /= 10;
  a = round(a);
  cout << 10 * (int)a;
  return 0;
}
