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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5. 	ios::sync_with_stdio(0);
  6. 	cin.tie(0);
  7. 	int n;
  8. 	cin >> n;
  9. 	vector<int> p(n);
  10. 	for(int i = 0; i < n; ++i){
  11. 		cin >> p[i];
  12. 	}
  13. 	long long ans = 0;
  14. 	priority_queue<pair<int,int>> pq;
  15. 	for(int i = n-1; i >= 0; --i){
  16. 		if(pq.empty()) pq.push({p[i],-1});
  17. 		else {
  18. 			if(pq.top().first > p[i]) {
  19. 				auto x = pq.top();
  20. 				pq.pop();
  21. 				ans += x.first  - p[i];
  22. 				if(x.second != -1) {
  23. 					pq.push({x.first, -1});
  24. 				}
  25. 				pq.push({p[i],1});
  26. 			}
  27. 			else {
  28. 				pq.push({p[i],-1});
  29. 			}
  30. 		}
  31. 	}
  32. 	cout << ans << endl;
  33. }
Success #stdin #stdout 0s 15408KB
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https://ideone.com/HPBkr4
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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