Ek test m run error q araha hai? am i miss any corner cases?

#1
#2

hi @sroy3166
run error is because of

 while(fast->next!=NULL)
	{
		slow = slow->next;
		fast = fast->next;
	}

if fast==NULL then you are trying to access NULL->next which is giving run error

correct one

	while(fast&&fast->next!=NULL)
	{
		slow = slow->next;
		fast = fast->next;
	}

but this will give wrong ans

for this input
5 4 3 2 1-1
5
you output is 4
but correct ans is 5

make one change
at line 28 add this line
if(fast==NULL)return head;

modified code