https://school.programmers.co.kr/learn/courses/30/lessons/138477?language=java
import java.util.Arrays;
class Solution {
public int[] solution(int k, int[] score) {
int[] answer = new int[score.length];
int[] arr = new int[k];
Arrays.fill(arr,2001);
for(int i=0;i<score.length;i++){
if(i < k) arr[i]=score[i];
if(i >=k && arr[0] < score[i]) arr[0] = score[i];
Arrays.sort(arr);
answer[i] = arr[0];
}
return answer;
}
}