백준 1546번

원본 : www.acmicpc.net/problem/1546

1546번: 평균

 

풀이

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {

	public static void main(String[] args) throws Exception {
		
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(System.out));
		
		int n = Integer.parseInt(reader.readLine());
		double arr[] = new double[n];
		
		String str = reader.readLine();
		double max = 0;
		
		for (int i = 0; i < n; i++) {
			arr[i] = Integer.parseInt(str.split(" ")[i]);
			if (arr[i] > max) {
				max = arr[i];
			}
		}
		
		double sum = 0;
		for (int i = 0; i < n; i++) {
			arr[i] = arr[i] / max * 100;
			sum += arr[i];
		}
		
		writer.write(String.valueOf(sum / n));
		
		writer.flush();
	}

}