importPackage(java.io);
importPackage(java.lang);
 
// your code goes here
 
function maxOfSumChain(arr,k){
  var array = [];
	for(var i = 0; i < arr.length-k; i++){
    var sum = 0;
    for(var x = i; x <= k + x; x ++){
      sum += arr[x];
    }
    array.push(sum);
  }
 
  console.log(array);
 
  var max = array[0];
  for(var x = 0; x < array.length; x ++){
    if(array[x] > max){
      max = array[x];
    }
  }
  return max;
}
 
console.log(maxOfSumChain([1,3,2],2));

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