def maximum_of_3_a(a, b, c):
    maxim = a
    if b > maxim:
        maxim = b
    if c > maxim:
        maxim = c
    return maxim

def maximum_of_3_b(a, b, c):
    if a >= b and a >= c:
        maxim = a
    elif b >= a and b >= c:
        maxim = b
    elif c >= a and c >= b:
        maxim = c
    return maxim

def maximum_of_3_c(a, b, c):
    if a >= b:
        if a >= c:
            maxim = a
        else:
            maxim = c
    else:
        if b >= c:
            maxim = b
        else:
            maxim = c
    return maxim

# your choice
#maximum_of_3 = maximum_of_3_a
#maximum_of_3 = maximum_of_3_b
maximum_of_3 = maximum_of_3_c