Merging point of two linked lists

ProblemStatement: You have two singly linked lists. Both are merging at one point. You are given two root nodes.

Stack s1 = new Stack();

Stack s2 = new Stack();



node temp = root1;
while(temp!= null) S1.Push(temp);

temp = root2;
while(temp!= null) S2.Push(temp);


while(true)
{
temp = S1.Pop();
if(temp != S2.Pop)
{
break;
}


}
Answer = temp