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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int ans(vector<int> &pre,int k){
  4. 	int a=0;
  5. 	for(int i=0;i<pre.size();i++){
  6. 		for(int j=0;j<i;j++){
  7. 			if(pre[i]-pre[j]==k)a++;
  8. 		}
  9. 	}
  10. 	return a;
  11. }
  12. int main() {
  13. 	int n;cin>>n;
  14. 	vector<int>v(n),pre(n);
  15. 	for(int i=0;i<n;i++){
  16. 		cin>>v[i];
  17. 		if(i==0){
  18. 			pre[i]=v[i];
  19. 		}else{
  20. 			pre[i]=pre[i-1]+v[i];
  21. 		}
  22. 	}
  23. 	int k;cin>>k;
  24. 	cout<<ans(pre,k)<<endl;
  25.  
  26. 	return 0;
  27. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/FyQiMe
language:
C++14 (gcc 8.3)
created:
3 hours ago
visibility:
public

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