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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. long arr[50010],sum[50010][18],bst[50010][18],lt[50010][18],rt[50010][18];
  4. int main(){
  5. 	long n;
  6. 	scanf("%ld",&n);
  7. 	for(int i=0;i<n;i++){
  8. 		scanf("%ld",&arr[i]);
  9. 	}
  10. 	for(int i=0;i<n;i++){
  11. 		sum[i][0]=arr[i];
  12. 		bst[i][0]=arr[i];
  13. 		lt[i][0]=arr[i];
  14. 		rt[i][0]=arr[i];
  15. 	}
  16. 	for(int i=0;i<n;i++){
  17. 		for(int j=1;i+(1<<(j))-1<n;j++){
  18. 			lt[i][j]=max(lt[i][j-1],sum[i][j-1]+lt[i+ 1<<(j-1) ][j-1]);
  19. 			rt[i][j]=max(rt[i][j-1]+sum[i+ 1<<(j-1)][j-1],rt[i+ 1<<(j-1)][j-1]);
  20. 			sum[i][j]=sum[i+ 1<<(j-1)][j-1]+sum[i][j-1];
  21. 			bst[i][j]=max(max(bst[i][j-1],bst[i+ 1<<(j-1)][j-1]),rt[i][j-1]+lt[i+ 1<<(j-1)][j-1]);
  22. 		}
  23. 	}
  24. 	long q,x,y,z;
  25. 	scanf("%ld",&q);
  26.  
  27. 	while(q--){
  28. 		scanf("%ld %ld",&x,&y);
  29. 		//We can calculate the binary representation of (y-x) and calculate the answer
  30. 	}
  31. 	return 0;
  32. }
  33.  
Time limit exceeded #stdin #stdout 5s 17560KB
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https://ideone.com/kw0T2S
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
secret

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