#include <iostream>

using namespace std;

int main()
{
    int num;
    cin >> num;
    int ones_place = num % 10;
    if (ones_place >= 0 && ones_place < 5) {
        num = num - ones_place;
    }else if (ones_place >= 5 && ones_place <= 9) {
        num = num - ones_place + 10;
    }
    cout << num;
    return 0;
}