#include<iostream>
#include<cmath>
#include<algorithm>
using namespace std;
int main(){
    int a,h=10,t=0;
    cin >> a;
    a = a*60/100;
    t += (a%60);
    h += (a/60);
    h = h % 24;
    cout << h << ':';
    if(t<10)    cout << '0' << t << endl;
    else    cout << t << endl; 
    return 0;
}