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  1. #include <iostream>
  2. #include <unordered_set>
  3. using namespace std;
  4.  
  5. struct Node
  6.    {
  7.        int data;
  8.        Node* next;
  9.    };
  10.  
  11. int FindMergeNode_Hash(Node *headA, Node *headB);
  12.  
  13. int main()
  14. {
  15.     Node *a = new Node();
  16.     Node *b = new Node();
  17.     Node *c = new Node();
  18.     Node *d = new Node();
  19.     Node *e = new Node();
  20.     Node *f = new Node();
  21.     Node *g = new Node();
  22.  
  23.     a->data=1;
  24.     a->next=b;
  25.  
  26.     b->data=2;
  27.     b->next=c;
  28.  
  29.     c->data=3;
  30.     c->next=d;
  31.  
  32.     d->data=4; // Meeting Point
  33.     d->next=e;
  34.  
  35.     e->data=5;
  36.     e->next=f;
  37.  
  38.     f->data=6;
  39.     f->next=g;
  40.  
  41.     g->data=7;
  42.     g->next=NULL;
  43.  
  44.     Node *A = new Node();
  45.     Node *B = new Node();
  46.     Node *C = new Node();
  47.  
  48.     A->data = 11;
  49.     A->next = B;
  50.  
  51.     B->data = 12;
  52.     B->next = C;
  53.  
  54.     C->data = 13;
  55.     C->next = d;
  56.  
  57.     int ans = FindMergeNode_Hash(A, a);
  58.     cout<<"Lists meet at "<<ans<<"\n";
  59.     return 0;
  60. }
  61.  
  62. int FindMergeNode_Hash(Node *headA, Node *headB)
  63. {
  64. 	cout<<headB->data<<endl;
  65.     unordered_set<Node**> h;
  66.     while(headA->next)
  67.     {
  68.         h.insert(&headA);
  69.         headA = headA->next;
  70.     }
  71.     cout<<"Complete\n";
  72.     cout<<headB->data; // Stuck here in an infite loop
  73.     while(headB->next)
  74.     {
  75.         unordered_set <Node**>::iterator got = h.find (&headB);
  76.         if ( got != h.end() )
  77.             return headB->data;
  78.     }
  79.     return -1;
  80. }
Time limit exceeded #stdin #stdout 5s 4312KB
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https://ideone.com/P5AZR7
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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