/* package codechef; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class codechef
{
{
// your code goes here
int T,N,K,max=0;;
Scanner sc
= new Scanner
(System.
in); T = sc.nextInt();
while(T-->0)
{
N = sc.nextInt();
K = sc.nextInt();
int[] a = new int[N];
for(int i=0;i<N;i++)
a[i] = sc.nextInt();
for(int i = 0;i<=N-K;i++)
{
System.
out.
println("i = " + i
+ "k = " + K
); int sum = 0;
for(int j=i;j<i+K;j++)
sum = sum + a[j];
if(sum>max)
max = sum;
}
System.
out.
print("sum = " + max
+ " "); }
}
}
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