#include<bits/stdc++.h>
using namespace std;
int main(){
    double s,t;
    cin >> s;
    t=s;
    s=floor(s/100+10);
    cout << s << ":";
    int n=(t/10)*6;
    n=n%60;
    if(n<10) cout << 0;
    cout << n << endl;
}