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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. long long minDissatisfaction(vector<long long> a, vector<long long> b){
  5. 	long long n = a.size();
  6. 	vector<long long> A(n); // will contain (ai - bi)
  7. 	long long sum = 0;
  8. 	for (int i = 0; i < n; i++){
  9. 		A[i] = a[i] - b[i];
  10. 		sum = sum + (b[i]*n - a[i]);
  11. 	}
  12.  
  13. 	sort(A.begin(), A.end(), greater<long long>());
  14.  
  15. 	for (int j = 0; j < n; j++){
  16. 		sum += (A[j] * (j+1));
  17. 	}
  18.  
  19. 	return sum;
  20. }
  21.  
  22. int main() {
  23. 	// your code goes here
  24. 	long long n; cin >> n;
  25. 	vector<long long> a(n);
  26. 	vector<long long> b(n);
  27. 	for (int i = 0; i < n; i++){
  28. 		cin >> a[i] >> b[i];
  29. 	}
  30.  
  31. 	cout << minDissatisfaction(a, b);
  32. 	return 0;
  33. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/It7qA1
language:
C++14 (gcc 8.3)
created:
11 days ago
visibility:
public

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