6

a = int(input())
b = int(input())
c = int(input())

r1 = abs(a-b)
r2 = abs(b-c)
if r1 == r2:
    print(c+r1)
    print(4)
elif r1 * 2 == r2:
    print(b+r1)
    print(3)
elif r2 * 2 == r1:
    print(a+r2)
    print(2)