#include <cstdlib>
#include <iostream>

#include <typeinfo>
using namespace std;
int main(){
int a;
cin>>a;
int hour=10+(a/100);
int m=(a-(a/100)*100)*60/100;


if(int(m)<9){
    
cout<<int(hour)<<":"<<'0'<<m<<endl;
}else{
cout<<int(hour)<<":"<<m<<endl;
}

}