#include <iostream>
#include<utility>
#include <vector>
#include <map>
#include<string>
#include<queue>
#include<math.h>
#define pb push_back
#define all(x) begin(x),end(x)
#define ll long long
#define P pair<int,int>
#define lP pait<ll,ll>
using namespace std;
int main() {
    int a,t,h,m;
    cin>>a;
    t=60*a/100;
    h=(10+t/60)%24;
    m=t%60;
    if(m<10) cout<<h<<':'<<'0'<<m<<endl;
    else cout<<h<<':'<<m<<endl;
    return 0;
}