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  1. /**
  2.  * Definition for singly-linked list.
  3.  * struct ListNode {
  4.  *     int val;
  5.  *     ListNode *next;
  6.  *     ListNode() : val(0), next(nullptr) {}
  7.  *     ListNode(int x) : val(x), next(nullptr) {}
  8.  *     ListNode(int x, ListNode *next) : val(x), next(next) {}
  9.  * };
  10.  */
  11.  
  12. class Solution {
  13. public:
  14.     int GCD(int num1, int num2)
  15.     {
  16.         if (num2 == 0)
  17.             return num1;
  18.         return GCD(num2, num1 % num2);
  19.     }
  20.  
  21.     ListNode* insertGreatestCommonDivisors(ListNode* head)
  22.     {
  23.         ListNode* ptr = head;
  24.         while(ptr->next != nullptr)
  25.         {
  26.             int a = ptr->val;
  27.             int b = ptr->next->val;
  28.             int c = GCD(a, b);
  29.  
  30.             /*** 1. Correct ***/
  31.             ListNode* n = new ListNode(c);
  32.             n->next = ptr->next;
  33.             ptr->next = n;
  34.  
  35.             /*** 2. Wrong ***/
  36.             ListNode n(c, ptr->next);
  37.             ptr->next = &n;
  38.  
  39.             ptr = ptr->next->next;
  40.         }
  41.         return head;
  42.     }
  43. };
Compilation error #stdin compilation error #stdout 0s 0KB
comments ()
stdin
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Standard input is empty
compilation info 
prog.cpp:21:5: error: ‘ListNode’ does not name a type
     ListNode* insertGreatestCommonDivisors(ListNode* head)
     ^~~~~~~~
stdout
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Standard output is empty
https://ideone.com/i5eC0B
language:
C++ (gcc 8.3)
created:
323 days ago
visibility:
secret

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