#include <iostream>
using namespace std;
int main()
{
    int a;
    cin>>a;
    int arr[] = {3600,60,1};
    for (int i=0;i<3;++i)
    {
        if (i==2)
        {
            printf("%d",a/arr[i]);
        }
        else
        {printf("%d:",a/arr[i]);}

        a%=arr[i];
    }

}