Doubt in Intersection point of linked list

#1

Why is my code giving TLE? Pleas help.
Code: https://ide.codingblocks.com/s/573568

#2

Update this

Node *intersectionOfTwoLinkedLists(Node *l1, Node *l2)
{
    int len1 = length(l1);
    int len2 = length(l2);
    int d;

    if(len1 > len2){
        d = len1 - len2;
        while(d--)
            l1 = l1->next;
    }else{
        d = len2 - len1;
        while(d--)
            l2 = l2->next;
    }
    while(l1 != nullptr and l2 != nullptr){
        if(l1->data == l2->data)
            return l1;
        l1 = l1->next;
        l2 = l2->next;
    }
    return nullptr;
}
#3

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