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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int compare(const void *a, const void *b) {
  5.     return (*(int*)a - *(int*)b);
  6. }
  7.  
  8. int main() {
  9.     int n;
  10.     scanf("%d", &n);
  11.     int x[1000];
  12.     for (int i = 0; i < n; i++) {
  13.         scanf("%d", &x[i]);
  14.     }
  15.  
  16.     qsort(x, n, sizeof(int), compare);
  17.  
  18.     int sum = 0;
  19.     for (int i = 0; i < n - 1; i += 2) {
  20.         sum += x[i + 1] - x[i];
  21.     }
  22.  
  23.     printf("%d", sum);
  24.     return 0;
  25. }
Success #stdin #stdout 0s 5252KB
comments (?)
stdin 
5
4 10 0 12 2
stdout 
8
https://ideone.com/82lzh4
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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