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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n; cin >> n;
  6. 	vector<int> arr(n);
  7. 	for(int i = 0; i < n; i++){
  8. 		cin >> arr[i];
  9. 	}
  10. 	vector<int> temp(n);
  11. 	for(int i = 0; i < n; i++)
  12. 	temp[i] = arr[i]-i;
  13.  
  14. 	unordered_map<int,int> mp;
  15. 	for(int i = 0; i < n; i++){
  16. 		mp[temp[i]] += arr[i];
  17. 	}
  18. 	int res = INT_MIN;
  19. 	for(auto it : mp){
  20. 		int val = it.second;
  21. 		res = max(res, val);
  22. 	}
  23. 	cout << res;
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/SwfK8v
language:
C++14 (gcc 8.3)
created:
41 minutes ago
visibility:
public

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