from cmath import phase
from math import degrees
if __name__ == "__main__":
    degree_sign = u'\N{DEGREE SIGN}'
    
    AB, BC = float(input().strip()), float(input().strip())
    AC = pow(AB*AB + BC*BC,.5)
    A = complex(0,AB)
    C = complex(BC,0)
    K = A+C
    M = K/2
    radian = phase(M)
    degree = round(degrees(radian))
    print(f"{degree}{degree_sign}")