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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	int n;
  7. 	cin>>n;
  8. 	int *arr=new int[n];
  9. 	for(int i=0;i<n;i++){
  10. 		cin>>arr[i];
  11. 	}
  12. 	int presum[n];
  13. 	presum[0]=arr[0];
  14. 	for(int i=1;i<n;i++){
  15. 	    presum[i]=presum[i-1]+arr[i];
  16. 	}
  17. 	int q;
  18. 	cin>>q;
  19. 	while(q--){
  20. 		int sum=0;
  21. 		int a,b;
  22. 		cin>>a>>b;
  23. 		if(a-1>=0){
  24. 	        sum=presum[b]-presum[a-1];
  25. 	        cout<<sum;
  26. 		}
  27. 		else cout<<presum[b];
  28. 	}
  29.  
  30. 	return 0;
  31. }
Success #stdin #stdout 0.01s 5316KB
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stdin
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3
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stdout
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https://ideone.com/QeNlYu
problem CSUMQ, based on SPOJ submission 35263718 (CPP14), 2025-11-26 09:46:27
language:
C++14 (clang 8.0)
created:
2 days ago
visibility:
public

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