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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	int t,i,n,k;
  7. 	cin>>t;
  8. 	while(t--){
  9. 		cin>>n>>k;
  10.  
  11. 		int ar[n];
  12. 		int sum=0;
  13.  
  14. 		for(i=0;i<n;i++){
  15. 			cin>>ar[i];
  16. 			sum+=ar[i];
  17. 		}
  18. 		if(sum<k){
  19. 			cout<<-1<<endl;
  20. 		}
  21. 		else if(sum==k&&n==1){
  22. 			cout<<n<<endl;
  23. 		}
  24. 		else{
  25. 			vector<int>pre;
  26. 			int ans=0;
  27. 			pre.push_back(ar[0]);
  28. 			for(i=1;i<n;i++){
  29. 				pre.push_back(pre[i-1]+ar[i]);
  30. 				//cout<<pre[i-1];
  31. 				if(pre[i]>=k){
  32. 					int rem=pre[i]-k;
  33. 					if(rem==0){
  34. 						ans=max(ans,i+1);
  35. 					}
  36. 					else{
  37. 						int indx=lower_bound(pre.begin(),pre.end(),rem)-pre.begin();
  38. 						ans=max(ans,i-indx);
  39. 					}
  40. 				}
  41.  
  42.  
  43.  
  44. 			}
  45.  
  46.  
  47. 			cout<<n-ans<<endl;
  48.  
  49. 		}
  50. 	}
  51.  
  52. 	return 0;
  53. }
Success #stdin #stdout 0.01s 5360KB
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https://ideone.com/4JGNlX
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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