UVa 579 - Clock Hands

// UVa 579 - Clock Hands

#include <iostream>
#include <string>
#include <stdio.h>
using namespace std;

int main() {
	string l;
	getline(cin, l);
	while (l.length() != 4 || l[0] != '0' || l[2] != '0' || l[3] != '0') {
		int h = (l[0] - '0');
		if (l[1] != ':')
			h = h * 10 + (l[1] - '0');
		int m = (l[l.length() - 1] - '0') + (l[l.length() - 2] - '0') * 10;
		double am = (m * 360.0 / 60.0);
		double ah = (m / 60.0 + h) / 12.0 * 360.0;
		double mx = max(am, ah);
		double mn = min(am, ah);
		double wise = mx - mn;
		double counter = mn + 360 - mx;
		double sol = min(wise, counter);
		printf("%.3f\n", sol);
		getline(cin, l);
	}
	return 0;
}