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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	int n , q;
  7. 	cin>>n;
  8. 	cin>>q;
  9. 	int arr[n];
  10. 	for(int i = 0 ; i< n ; i++){
  11. 		cin>> arr[i];
  12. 	}
  13. 	int p[n];
  14. 	p[0] = arr[0];
  15. 	for(int i = 1; i<n ; i++){
  16. 		p[i] = p[i-1] + arr[i];
  17. 	}
  18. 	while(q--){
  19. 		int l , r;
  20. 		cin>>l>>r;
  21. 		int sum = 0;
  22. 		if(l==0){
  23. 			sum = p[r];
  24. 		}
  25. 		else {
  26. 			sum = p[r] + p[l-1];
  27. 		}
  28. 		cout<<sum<<endl;
  29. 	}
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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8 3
5 8 7 6 5 2 1 1
0 2
0 3
3 5
stdout
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20
26
53
https://ideone.com/F23D1l
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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