#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

int main(){
    int n, h = 10, m;
    cin >> n;
    m = n*60/100;
    if (m > 60){
        h += m/60;
        m %= 60;
    }
    printf("%02d:%02d\n", h, m);
}