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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int main() {
  4. 	int t;
  5. 	cin >> t;
  6. 	for (int i = 0; i < t; i++) {
  7. 		int n, m;
  8. 		cin >> n >> m;
  9. 		vector<vector<int>> a(n, vector<int>(m));
  10. 		for (int i = 0; i < n; i++) {
  11. 			for (int j = 0; j < m; j++) { cin >> a[i][j]; }
  12. 		}
  13.  
  14. 		long long ans = 0;
  15. 		for (int i = 0; i < m; i++) {
  16. 			vector<long long> temp;
  17. 			long long sum = 0;
  18. 			for (int j = 0; j < n; j++) {
  19. 				temp.push_back(a[j][i]);
  20. 				sum += a[j][i];
  21. 			}
  22. 			long long curr = 0;
  23. 			sort(temp.begin(), temp.end());
  24. 			for (int j = 0; j < n; j++) {
  25. 				curr += temp[j];
  26. 				ans += llabs((sum - curr) - (n - 1 - j) * temp[j]);
  27. 			}
  28. 		}
  29.  
  30. 		cout << ans << "\n";
  31. 	}
  32. }
Success #stdin #stdout 0.01s 5320KB
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Standard input is empty
stdout 
Standard output is empty
https://ideone.com/WpLptR
language:
C++14 (gcc 8.3)
created:
7 hours ago
visibility:
public

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