#include<bits/stdc++.h>
#define REP(i,n) for(int i=0;i<(n);i++)
#define ALL(v) (v).begin(),(v).end()
#define INF 1e18
#define SIZE 100005

using namespace std;
typedef pair<int,int> P;

//-----------------------------------------------------------------------


signed main()
{
    int a; cin>>a;
    int x=60*a/100;
    int h=10+(x/60),m=x%60;
    printf("%2d:%02d\n",h,m);
}