#include <cmath> #include <string> #include <vector> #include <iomanip> #include <iostream> #include <algorithm> #include <functional> using namespace std; int a; int main() { cin >> a; int t = a / 10 * 6; cout << (10 + t / 60) << (t % 60 < 10 ? ":0" : ":") << t % 60 << endl; return 0; }