A, B = map(int, input().split())
As = A - 0.5
Al = A + 0.5
Bs = B - 0.5
Bl = B + 0.5
for i in range(101):
    for j in range(101):
        if As *(i+j) <= 100* i <Al*(i+j) and Bs*(i+j) <=100*j < Bl*(i+j):        
            if i != 0 or j != 0:
                print(i+j)
                exit()