URI -1019 with C++

#include<iostream>
using namespace std;

int main()
{
    int N,h=0,m=0,s=0;
    cin>>N;
    h = N /3600;
    N = N % 3600;
    m = N / 60;
    s = N % 60;
    cout<<h<<":"<<m<<":"<<s<<endl;
    return 0;
}