풀이class Solution { public int[] getAverages(int[] nums, int k) { long[] prefix = new long[nums.length]; int[] answer = new int[nums.length]; prefix[0] = nums[0]; for(int i=1; i=0 && i+k 0)? prefix[i-k-1] : 0))/(2*k+1)); else answer[i]=-1; } return answer; }} 오늘 Arrays and Strings 完!