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  1. #include <stdio.h>
  2.  
  3. void findPairs(int arr[], int size) {
  4.  
  5.     for (int i = 0; i < size - 1; i++) {
  6.         for (int j = i + 1; j < size; j++) {
  7.             int sum = arr[i] + arr[j];
  8.  
  9.  
  10.             for (int k = 0; k < size - 1; k++) {
  11.                 for (int l = k + 1; l < size; l++) {
  12.                     if (k != i && k != j && l != i && l != j) {
  13.                         if (arr[k] + arr[l] == sum) {
  14.  
  15.                             for (int m = 0; m < size - 1; m++) {
  16.                                 for (int n = m + 1; n < size; n++) {
  17.                                     if (m != i && m != j && m != k && m != l && 
  18.                                         n != i && n != j && n != k && n != l) {
  19.                                         if (arr[m] + arr[n] == sum) {
  20.  
  21.                                             printf("Person 1: %d, %d\n", arr[i], arr[j]);
  22.                                             printf("Person 2: %d, %d\n", arr[k], arr[l]);
  23.                                             printf("Person 3: %d, %d\n", arr[m], arr[n]);
  24.                                             return;
  25.                                         }
  26.                                     }
  27.                                 }
  28.                             }
  29.                         }
  30.                     }
  31.                 }
  32.             }
  33.         }
  34.     }
  35.     printf("No pairs found with equal sum.\n");
  36. }
  37.  
  38. int main() {
  39.     int arr[] = {13, 26, 39, 52, 65, 78}; 
  40.     int size = sizeof(arr) / sizeof(arr[0]);
  41.  
  42.     findPairs(arr, size);
  43.  
  44.     return 0;
  45. }
Success #stdin #stdout 0s 5284KB
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stdin
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Standard input is empty
stdout
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Person 1: 13, 78
Person 2: 26, 65
Person 3: 39, 52
https://ideone.com/dgVVTR
language:
C (gcc 8.3)
created:
121 days ago
visibility:
public

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