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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		Scanner sc=new Scanner(System.in);
  14. 		int n=sc.nextInt();
  15. 		int k=sc.nextInt();
  16. 		int a[]=new int[n+1];
  17. 		for(int i=1;i<=n;i++)
  18. 		a[i]=sc.nextInt();
  19.  
  20. 		int pre[]=new int[n+1];
  21. 		for(int i=1;i<=n;i++)
  22. 		pre[i]=a[i]+pre[i-1];
  23.  
  24. 		int suf[]=new int[n+1];
  25. 		suf[n]=a[n];
  26.  
  27. 		for(int i=n-1;i>=1;i--)
  28. 		suf[i]=a[i]+suf[i+1];
  29.  
  30. 		int ans=0;
  31. 		for(int i=1;i<=n-k;i++)
  32. 		ans=Math.max(ans, pre[i]+suf[n-k+(i+1)]);
  33. 		System.out.println(ans);
  34. 	}
  35. }
Success #stdin #stdout 0.13s 54448KB
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stdin
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5
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5 -2 3 1 2
stdout
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8
https://ideone.com/dRse8q
language:
Java (HotSpot 12)
created:
21 hours ago
visibility:
public

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