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  1. #include <iostream>
  2. #include<bits/stdc++.h>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7. 	// your code goes here
  8. 	int n,x,y;
  9. 	cin>>n>>x>>y;
  10. 	vector<int> arr(n);
  11. 	vector<int> prefix(n);
  12.  
  13. 	for(int i=0;i<n;i++){
  14. 		cin>>arr[i];
  15.  
  16. 	if(i-y<0){
  17. 		prefix[i]=arr[i];
  18. 			}
  19. 	else{
  20. 		prefix[i]=arr[i]+prefix[i-y];
  21.  
  22. 	}
  23.  
  24.  
  25. 	}
  26.  
  27. 	int ans = INT_MAX;
  28.  
  29.  
  30. 	for(int i=0;i<n;i++){
  31. 		int index = i-(x-1)*y;
  32. 		if(index>=0){
  33. 		if(i-x*y>=0){
  34. 			int val = prefix[i]-prefix[i-x*y];
  35. 			ans = min(ans,val);
  36. 		}
  37. 		else{
  38. 			int val = prefix[i];
  39. 			ans = min(ans,val);
  40. 		}
  41.  
  42. 		}
  43. 	}
  44.  
  45. 	cout<<ans<<endl;
  46.  
  47.  
  48.  
  49. 	return 0;
  50. }
Success #stdin #stdout 0s 5324KB
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stdin
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10 3 2
4 2 5 4 3 5 1 4 2 7
stdout
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6
https://ideone.com/l962qA
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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