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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int ans(vector<int>&pre,int l,int r){
  5. 	if(l!=0){
  6. 		return(pre[r]-pre[l-1]);
  7. 	}
  8.    return pre[r];
  9. }
  10. int main() {
  11. 	// your code goes here
  12. 	int n;cin>>n;vector<int>v(n),pre(n);
  13. 	for(int i=0;i<n;i++){
  14. 		cin>>v[i];
  15. 		if(i==0){
  16. 			pre[i]=v[i];
  17. 		}else{
  18. 			pre[i]=pre[i-1]+v[i];
  19. 		}
  20. 	}
  21. 	int q;cin>>q;
  22. 	while(q--){
  23. 		int l,r;cin>>l>>r;
  24. 		cout<<ans(pre,l,r)<<endl;
  25. 	}
  26.  
  27.  
  28. 	return 0;
  29. }
Success #stdin #stdout 0s 5328KB
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stdin
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5 
1 2 3 4 5
4
0 1
1 2
2 3 
3 4
stdout
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3
5
7
9
https://ideone.com/iPkKye
language:
C++14 (gcc 8.3)
created:
5 hours ago
visibility:
public

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