#include <iostream>
#include <iomanip>
using namespace std;
int main(void) {
	int h = 10, m = 0;
	int a;
	cin >> a;
	int t = 60 * a / 100;
	h += t / 60;
	m += t % 60;
	cout << setfill('0') << right << setw(2) << h 
		<< ':' << setw(2) << m << endl;
	return 0;
}