Verified answer

M=int(input())

N=int(input())

a=0

v=0

for i in range(M,N+1):

   a=str(i)

   k=0

   for b in range(len(a)):

       if a[b]=='3':

           k=k+1

   if k==2:

       v=v+1

print(v)

Ответ:

m = int(input())

n = int(input())

count = 0

for i in range(m, n+1):

   a = []

   while i > 0:

       a.append(i%10)

       i //= 10

   if a.count(3) == 2:

       count += 1

print(count)