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  1. #include<iostream>
  2. using namespace std;
  3. class node{
  4. public:
  5.     node *next;
  6.     int data;
  7.     node(int d){
  8.         next =  NULL;
  9.         data = d;
  10.     }
  11. };
  12. void insertAtTail(node *&head, int data){
  13.     if(head==NULL){
  14.         head= new node(data);
  15.         return;
  16.     }
  17.     node *temp = head;
  18.     while(temp->next!=NULL){
  19.        temp = temp->next;
  20.     }
  21.     temp->next = new node(data);
  22.     return;
  23. }
  24. node *buildInput(node *&head, int n){
  25.     int data;
  26.     for(int i=0;i<n;i++){
  27.         cin>>data;
  28.         insertAtTail(head,data);
  29.     }
  30.     return head;
  31. }
  32. void print(node *head){
  33.     while(head !=NULL){
  34.         cout<< head->data<<" ";
  35.         head = head->next;
  36.     }
  37. }
  38. node *merge(node *a, node *b){
  39.     if(a==NULL)
  40.         return b;
  41.     else if(b==NULL){
  42.         return a;
  43.     }
  44.     node *c;
  45.     if(a->data < b->data){
  46.         c=a;
  47.         c->next = merge(a->next,b);
  48.     }
  49.     else{
  50.         c=b;
  51.         c->next = merge(a,b->next);
  52.     }
  53.     return c;
  54. }
  55. int main(){
  56. node *head = NULL;
  57.     int t,n1,n2;
  58.     cin>>t;
  59.  
  60.     for(int i=0;i<t;i++){
  61.         cin>>n1;
  62.         node *head1 = buildInput(head,n1);
  63.         cin>>n2;
  64.         node *head2 = buildInput(head,n2);
  65.  
  66.         node *ans = merge(head1,head2);
  67.         print(ans);
  68.     }
  69.  
  70.   return 0;
  71. }
  72.  
Success #stdin #stdout 0s 4188KB
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https://ideone.com/5Q8EAE
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
secret

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