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  1. #include <iostream>
  2. #include<vector>
  3. #include<unordered_map>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	vector<int> nums={10,2,-2,-20,10};
  8. 	int k=-10;
  9. 	int sum=0;
  10. 	unordered_map<int,int> m;
  11. 	int count=0;
  12. 	m[0]=1;
  13.  
  14. 	for(int i=0;i<nums.size();i++) {
  15. 		sum+=nums[i];
  16. 		int ques=sum-k;
  17.  
  18. 		if(m.find(ques)!=m.end()) {
  19. 			count+=m[ques];
  20. 		}
  21.  
  22. 		m[sum]++;
  23. 	}
  24. 	cout<<count<<endl;
  25. 	return 0;
  26. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/dLWvLa
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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