题解 | #小乐乐计算函数#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static double max3(int a, int b, int c) {
        int maxNum = a;
        maxNum = a > b ? a : b;
        maxNum = maxNum > c ? maxNum : c;
        return maxNum;
    }
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        double m = max3(a + b, b, c) / 
        (max3(a, b + c, c) + max3(a, b, b + c));
        System.out.printf("%.2f",m);
    }
}