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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n; cin >> n; int arr[n]; int k;
  6. 	cin >> k;
  7. 	for(int i = 0; i < n; i++)
  8. 	cin >> arr[i];
  9.  
  10. 	int sum = 0;
  11. 	unordered_map<int, int> hash;
  12. 	hash[0] = -1;
  13. 	int maxl = INT_MIN;
  14. 	for(int i = 0; i < n; i++){
  15. 		sum += arr[i];
  16. 		if(hash.find(sum-k) != hash.end()){
  17. 			int len = i - hash[sum-k];
  18. 			maxl = max(maxl, len);
  19. 		}
  20. 		hash[sum] = i;
  21. 	}
  22. 	hash.clear(); sum = 0; int cnt = 0;
  23. 	hash[0] = -1;
  24. 	for(int i = 0; i < n; i++){
  25. 		sum += arr[i];
  26. 		if(hash.find(sum-k) != hash.end()){
  27. 			int len = i - hash[sum-k];
  28. 			if(len == maxl)
  29. 			cnt++;
  30. 		}
  31. 		hash[sum] = i;
  32. 	}
  33. 	cout << cnt;
  34. 	return 0;
  35. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/OKkJ4J
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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