#include <bits/stdc++.h>
using namespace std;
int main(){
    int i2,h=0,m=0,s=0;
    cin>>i2;
    s=i2;
    if(s>=60)m=s/60,s=s%60;
    if(m>=60)h=s/60,m=m%60;
    if(h<10)cout<<0;
    cout<<h<<":";
    if(m<10)cout<<0;
    cout<<m<<":";
    if(s<10)cout<<0;
    cout<<s<<"\n";
}
/**************************************************************
	Problem: 1081
	User: linzihang
	Language: C
	Result: Compile Error
****************************************************************/