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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4. typedef long long LL;
  5. typedef unsigned long long ULL;
  6. typedef vector<int> VI;
  7. typedef vector<LL> VLL;
  8. typedef pair<int, int> PI;
  9.  
  10. #define SI(x) scanf("%d", &x)
  11. #define SLL(x) scanf("%lld", &x)
  12. #define SORTV(v) sort(v.begin(), v.end())
  13. #define EACH(it, v) for(__typeof(v.begin()) it(v.begin()); it != v.end(); it++)
  14. #define pb(x) push_back(x)
  15. #define mp(x, y) make_pair(x, y)
  16. #define f first
  17. #define s second
  18.  
  19. template<class T> void print_array(T a[], int size) { for(int i=0; i<size; i++) cout<<a[i]<<" "; cout<<endl; }
  20.  
  21. template<class T> void print_array_v(T &a) { int size = a.size(); for(int i=0; i<size; i++) cout<<a[i]<<" "; cout<<endl; }
  22.  
  23. int main()
  24. {
  25. 	int T;
  26. 	scanf("%d", &T);
  27. 	assert(T<=10);
  28. 	while(T--)
  29. 	{
  30. 		int n; SI(n); assert(n<=1e3);
  31. 		int a[1010];
  32. 		for(int i=0; i<n; i++)
  33. 		{
  34. 			SI(a[i]);
  35. 			assert(a[i] <= 1e6);
  36. 		}
  37. 		sort(a, a+n);
  38. 		int sum = 0;
  39. 		for(int i=0; i<n/2; i++)
  40. 			sum += a[n-i-1] - a[i];
  41. 		cout<<sum<<endl;
  42. 	}
  43. 	return 0;
  44. }
Success #stdin #stdout 0s 3464KB
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stdout 
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https://ideone.com/nJddvt
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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