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  1. #include<bits/stdc++.h>
  2. #define f1(i, n) for(ll i=1;i<=n;++i)
  3. #define f0(i, n) for(ll i=0;i<n;++i)
  4. #define ull unsigned long long
  5. #define ll long long
  6. #define rev(a) reverse(a.begin(),a.end())
  7. #define all(x) x.begin(),x.end()
  8. #define so(A, n) sort(A+1, A+n+1)
  9. using namespace std;
  10. const int maxn = 200010;
  11. const int N = 5e6;
  12.  
  13. int main()
  14. {
  15. 	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  16. 	int n;
  17. 	cin >> n;
  18. 	map<int, vector<int>> v;
  19. 	int T[n + 1] = {}, A[n + 1], mi = INT_MAX, ma = INT_MIN;
  20. 	f1(i, n) {
  21. 		cin >> A[i];
  22. 		T[i] = T[i - 1] + A[i];
  23. 		v[A[i]].push_back(i);
  24. 		mi = min(mi, A[i]);	
  25. 		ma = max(ma, A[i]);
  26. 	}
  27. 	int res = 0;
  28. 	for (int i = mi; i <= ma; ++i) {
  29. 		for (int j = 0; j < v[i].size(); ++j) {
  30. 			for (int k = j; k < v[i].size(); ++k) {
  31. 				res = max(res, T[v[i][k]] - T[v[i][j] - 1]);
  32. 			}
  33. 		}
  34. 	}
  35. 	cout << res;
  36.  
  37.  
  38.  
  39. 	return 0;
  40. }
  41.  
  42.  
Success #stdin #stdout 0.14s 5284KB
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https://ideone.com/aMiB8o
language:
C++14 (gcc 8.3)
created:
13 days ago
visibility:
public

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