Ответ:

a = 20

b = 20

c = 30

d = 46

arr = [a, b, c, d]

max = a

for i in arr:

if(i > max):

max = i

print(max)

Ответ:

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

max_number = a

list_ = [a, b, c, d]

for i in list_:

   if i > max_number:

       max_number = i

print(max_number)