URI 1019

#include<iostream>
using namespace std;
int main()
{
    int n;
    while(cin>>n)
    {
        int hour=0;
        int minutes=0;
        int seconds=0;

        hour= n/3600;
        n= n- (hour*3600);
        minutes= n/60;
        seconds= n%60;

        cout<<hour<<":"<<minutes<<":"<<seconds<<endl;
    }
    return 0;
}