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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5.  
  6. struct Node {
  7.     int data;
  8.     Node* next;
  9.  
  10.  
  11. };
  12.  
  13.  
  14. int sumOfAbsoluteDifferences(Node* root) {
  15.     if (!root || !root->next) {
  16.  
  17.         return 0;
  18.     }
  19.  
  20.     int sum = 0;
  21.     Node* current = root;
  22.  
  23.  
  24.     while (current && current->next) {
  25.         sum += abs(current->data - current->next->data);
  26.         current = current->next->next;
  27.     }
  28.  
  29.     return sum;
  30. }
  31.  
  32.  
  33. void appendNode(Node*& root, int value) {
  34.     if (!root) {
  35.         root = new Node();
  36.         return;
  37.     }
  38.  
  39.     Node* current = root;
  40.     while (current->next) {
  41.         current = current->next;
  42.     }
  43.     current->next = new Node();
  44. }
  45.  
  46.  
  47. void print(Node* root) {
  48.     Node* current = root;
  49.     while (current) {
  50.         cout << current->data << " ";
  51.         current = current->next;
  52.     }
  53.     cout << endl;
  54. }
  55.  
  56.  
  57. int main() {
  58.     Node* root= NULL;
  59.  
  60.  
  61.     appendNode(root, 10);
  62.     appendNode(root, 20);
  63.     appendNode(root, 15);
  64.     appendNode(root, 5);
  65.  
  66.  
  67.     std::cout << "Linked list: ";
  68.     print(root);
  69.  
  70.  
  71.     int result = sumOfAbsoluteDifferences(root);
  72.     cout << "Sum of absolute differences: " << result << endl;
  73.  
  74.     return 0;
  75. }
  76.  
Success #stdin #stdout 0s 5288KB
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stdin
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Standard input is empty
stdout
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Linked list: 0 0 0 0 
Sum of absolute differences: 0
https://ideone.com/08GJ7O
language:
C++ (gcc 8.3)
created:
14 hours ago
visibility:
public

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