Question:

Question:

Clock Math

Limits: 1s, 512 MB

Given a time (hours as H and minutes as M), determine the smaller angle between the two hands of a clock showing the time and print it.

Input

The input will contain two integers: H (0 ≤ H < 12) and M (0 ≤ M < 60).

Output

Print the angle in degrees (accurate to 10^-4).

Samples

Input	Output
10 15 Solve in C: #include<stdio.h> int main() { float d,s,t; int m,h; scanf("%d %d",&h,&m); { d=(11*m-60*h)/2.0; if(d>0&&d>180) { s=360-d; printf("%.7f\n",s); } else if(d>0&&181>d) printf("%.7f\n",d); else if(d<1) { s=(-1)*d;; if(s>180) { t=360-s; printf("%.7f\n",t); } else printf("%.7f\n",s); } return 0; } }	142.5000000