#include <bits/stdc++.h>
#define INF 990000000
//31
using namespace std;

int main() {
int n;
cin>>n;

n*=10;

n/=100;

n*=60;

n/=10;

int sd=n%60;
if(sd<10){
cout << 10+n/60<<":"<<"0"<<n%60<<endl;
}else{
cout << 10+n/60<<":"<<n%60<<endl;
}




}