Verified answer

Код на Python:

n = int(input())

c1 = n//100

c2 = n//10%10

c3 = n%10

if n<100 or n>999:

   print('FALSE')

elif n<1000 and n>99:

   c1 = n//100

   c2 = n//10%10

   c3 = n%10

   if c1+c2+c3 == 13:

       print('ENTER')

   else:

       print('LOCK')