Question

Here is my code:

i=int(input("enter your number"))
j=int(input("enter your number"))
if i>j: #making x always greater than y
    x=i
    y=j
elif i<j:
    x=j
    y=i
else:
    print("invalid")
k=y
cyclelength=[]
while k<=x:
    list=[k]
    while k!=1:
        if(k%2==0):
            k=i//2
        else:
            k=3*k+1
        list.append(k)
    cyclelength.append(len(list))
    k+=1
print(y," ",x," ",max(cyclelength))

I get the following exception:

Traceback (most recent call last):
  File "C:/Python32/uva100.py", line 21, in <module>
    list.append(k)
MemoryError

Answer 1

Another problem in this block:

while k!=1:
    if(k%2==0):
        k //= 2
    else:
        k=3*k+1

k has the value 1 when you exit.

So you increment k to 2, reenter the while because k < x and reset k to 1

–> infinite loop

you have to define a new variable in you inner while or extract this block in another function