#include <iostream>

using namespace std;


int main()
{
	int a;
	int h, m;
	cin >> a;
	h = 10 + a / 100;
	m = 0.6*(a% 100);
	if(m<10)cout << h << ":0" << m << endl;
	else cout << h << ":" << m << endl;
    return 0;
}