Lets have a warmup question for trihacker coding event.... I'm going to keep the problem statement straight forward. In a right angled triangle ABC right angled at B D is the midpoint.

Given lengths AB and BC, find the angle DBC. Output should be the smallest integer not less than the angle DBC

For Example: If the angle MBC is 45.0000 print 45 and if it is is 45.7832 print 46

Input: First line contains two numbers which are the lengths of AB and BC.

Output: Print the required answer.

Constraints: 1 <= AB, BC<=100

Hint :-
Some Maths Library functions :-
sin(x) = sine value of x , similarly for cos and tan .
asin(x ) = inverse sin of x , similarly for cos and tan.
ceil(x) = smallest integer function
floor(x) = greatest integer function.