1 #include <stdio.h>
 2 #include <math.h>
 3 
 4 void Angle(int hour,int min);
 5 
 6 int main()
 7 {
 8     int min,hour;
 9     while(scanf("%d %d",&hour,&min)==2&&(hour!=0||min!=0))
10         Angle(hour,min);
11     return 0;
12 }
13 
14 void Angle(int hour,int min)
15 {
16     double hour_angle,min_angle;
17     min_angle=min*6;
18     hour_angle=hour*30+(double)min/2;
19     
20     double angle=fabs(min_angle-hour_angle);
21     if(angle>=180.0)
22         angle=360.0-angle;
23     printf("At %d:%02d the angle is %.1lf degrees.\n",hour,min,angle);
24 }