Java - 백준 코딩테스트 1546번 [1차원 배열 - 평균]

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;
 
public class Average {
 
    public static void main(String[] args) throws IOException {
        // 20210622 - 1546번
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        
        int nums = Integer.parseInt(br.readLine());
        StringTokenizer st = new StringTokenizer(br.readLine(), " ");
        int arr[] = new int[nums];
        
        for (int i = 0; i < arr.length; i++) {
            int num = Integer.parseInt(st.nextToken());
            arr[i] = num;
        }
        
        int max = 0;
        
        for (int i = 0; i < arr.length; i++) {
            max = Math.max(max, arr[i]);
        }
        
        double newArr[] = new double[arr.length];
        double sum = 0;
        
        for (int i = 0; i < newArr.length; i++) {
            newArr[i] = (double)arr[i] / max * 100;
            sum += newArr[i];
        }
        
        double avg = sum / arr.length;
        
        bw.write(String.valueOf(avg));
        bw.flush();
        bw.close();
        br.close();
    }
}