#include <bits/stdc++.h> #define rep(i,a,b) for(int i=a;i<(b);++i) #define erep(i,a,b) for(int i=a;i<=(int)(b);++i) #define per(i,a,b) for(int i=(a);i>(b);--i) #define eper(i,a,b) for(int i=(a);i>=b;--i) #define pb push_back #define mp make_pair #define INF (1<<31)-1 #define MOD 1000000007 #define all(x) (x).begin(),(x).end() #define vii vector<int> #define vll vector<long long> using namespace std; typedef long long ll; typedef pair<int,int> Pii; template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; } template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; } int dy[]={0, 0, 1, -1}; int dx[]={1, -1, 0, 0}; int gcd(int a,int b){return b?gcd(b,a%b):a;} int lcm(int a,int b){return a/gcd(a, b)*b;} int n, t; int main() { cin.tie(0); ios::sync_with_stdio(false); cin >> n; t = n * 60 / 100; // cout << t << endl; int jikan = 10 + t / 60, fun = (int)t % 60; cout << jikan << ":" << (fun < 10 ? "0" + to_string(fun) : to_string(fun)) << endl; return 0; }