NZEC Error | HS08TEST | Python 3.5

general
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1

y,x = input().split()

x = int(x)

y = float(y)

if y>=0 and x>0:

if x%5==0 and y>=x+.5:
    print("{:.2f}".format(y-x-.5))
else:
    print("{:.2f}".format(y))

Can you please tell where the error is ?