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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int arr[]= {1,0,1,2,10,5};
  6. 	int n=sizeof(arr)/sizeof(arr[0]);
  7. 	int sum=3;
  8. 	int count=0;
  9. 	vector<int> prefixSum(n);
  10. 	prefixSum[0]=arr[0];
  11. 	for(int i=1;i<n;i++)
  12. 		prefixSum[i]=prefixSum[i-1]+arr[i];
  13. 	for(int j=0;j<n;j++){
  14. 		if(prefixSum[j]==sum)
  15. 			count++;
  16. 		for(int i=0;i<j;i++){
  17. 			if(prefixSum[i]==prefixSum[j]-sum)
  18. 				count++;
  19. 		}
  20. 	}
  21. 	cout<<count;
  22. 	return 0;
  23. }
  24.  
Success #stdin #stdout 0s 5316KB
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https://ideone.com/k8BoLM
language:
C++ (gcc 8.3)
created:
3 hours ago
visibility:
public

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