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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[] arr=new int[n+1];
  16.         int k=sc.nextInt();
  17.         for(int i=1;i<=n;i++){
  18.             arr[i]=sc.nextInt();
  19.         }
  20.         int maxAns=0;
  21.         int[] ps=new int[n+2];
  22.         int[] ss=new int[n+2];
  23.         for(int i=1;i<=n;i++){
  24.             ps[i]=ps[i-1]+arr[i];
  25.         }
  26.         for(int i=n;i>=1;i--){
  27.             ss[i]=ss[i+1]+arr[i];
  28.         }
  29.         for(int j=0;j<=k;j++){
  30.             maxAns=Math.max(maxAns,ps[j]+ss[n+2-k+j-1]);
  31.         }
  32.         System.out.println(maxAns);
  33. 	}
  34. }
Success #stdin #stdout 0.17s 56628KB
comments (?)
stdin 
5
3
5 -2 3 1 2
stdout 
8
https://ideone.com/tAHvHN
language:
Java (HotSpot 12)
created:
2 days ago
visibility:
public

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