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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	long long n,q;
  7. 	cin>>n>>q;
  8.  
  9. 	long long arr[n];
  10. 	for(long long i=0;i<n;i++)
  11. 	{
  12. 		cin>>arr[i];
  13. 	}
  14.  
  15. 	long long prefix[n+1];
  16. 	prefix[0]=0;
  17. 	for(long long i=1;i<=n;i++)
  18. 	{
  19. 		prefix[i] = prefix[i-1]+arr[i-1];
  20. 	}
  21.  
  22. 	for(long long i=0;i<q;i++)
  23. 	{
  24. 		long long a,b;
  25. 		cin>>a>>b;
  26.  
  27. 		cout<<prefix[b]-prefix[a-1]<<endl;
  28. 	}
  29.  
  30.  
  31. 	return 0;
  32. }
Success #stdin #stdout 0.01s 5272KB
comments (?)
stdin
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8 4
3 2 4 5 1 1 5 3
2 4
5 6
1 8
3 3
stdout
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11
2
24
4
https://ideone.com/6YPSXM
language:
C++14 (gcc 8.3)
created:
19 days ago
visibility:
public

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