M={}
def f(x,y,z):
 y,z=y-x,z-x
 R=M[(0,y,z)]=M.get((0,y,z))or f(f(-5,y,z),f(y-5,z,0),f(z-5,0,y))if 0>y else z
 return x+R
while 1:print f(*[int(n) for n in raw_input().split()])