#include<iostream>#include<functional>#include<queue>#include<vector>#include<stdio.h>using namespace std;int main(){		while (true)	{		int h, m;		scanf("%d:%d", &h, &m);		if(h == 0 && m == 0)			return 0;		double mm = m * 6;		//为什么是0.5 (m*6)*(1/12)		//1/12,分钟走360度,时钟走30度		double hh = h * 30 + m * 0.5;		double d = hh - mm;		if(d < 0)		{			d = d + 360;		}		if(d > 180)		{			d = 360 - d;		}		printf("%.3f\n", d);	}	return 0;}