While loop-if condition doesn’t work-any bug?

Question

Hi all, I’m trying a little code to solve a simple maths problem. I have 10 dogs and cats in total, with 30 legs. I want to know how many dogs and how many cats there are. Here is the code, but my interpreter freezed when running this code. I don’t know if there’s something wrong with it:

a=10
b=30
chic=0
while chic<a:
if b%2==0:
if (b/2)>a:
dog=b/2-a
chic=a-dog
else:
print("Impossible")
chic=chic+1
print(chic, dog)

Answer 1

b/a is never changed so
dog=b/2-a
chic=a-dog
gets executed every loop-iteration

since you set chic inside the loop it doesn't matter if you add 1 to it chic will always be smaller than a and the while loop never stops

Answer 2

Thank you Anton Böhler :)