ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) {
if(l1==NULL) return l2;
if(l2==NULL) return l1;
ListNode* c;
if(l1->val < l2->val){
c=l1;
c->next= mergeTwoLists(l1->next, l2);
}
else{
c=l2;
c->next= mergeTwoLists(l1, l2->next);
}
return c;
}
what is the issue with this code …the compile message says success but it fails to pass one test case
