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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	int n , k;
  7. 	cin>>n;
  8. 	cin>>k;
  9. 	int arr[n];
  10. 	for(int i = 0; i<n ; i++){
  11. 		cin>>arr[i];
  12. 	}
  13. 	unordered_map<int,int> mpp;
  14. 	mpp[0] = 1;
  15. 	int p[n];
  16. 	p[0]= arr[0];
  17. 	for(int i = 0; i< n ; i++){
  18. 		p[i] = p[i-1] + arr[i];
  19. 	}
  20. 	int count = 0;
  21. 	for(int j = 0; j<n ; j++){
  22. 		int r = p[j] - k;
  23. 		count += mpp[r];
  24. 		mpp[p[j]] += 1;
  25.  
  26. 	}
  27. 	cout<<count<<endl;
  28. 	return 0;
  29. }
Success #stdin #stdout 0.01s 5288KB
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stdin
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10
8
2 2 3 5 2 2 3 2 2 1
stdout
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2
https://ideone.com/Uee6gb
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
public

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