评论区高手如云，哈哈哈。这样子用例就全部跑过了

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 void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 埃及分数是分子为1的分数。所以，如3/8 = 1/8 + 1/8 + 1/8
        while (in.hasNext()) {
            String s = in.next();
            String[] split = s.split("/");
            StringBuilder builder = new StringBuilder();
            int n = Integer.parseInt(split[0]);
            for (int i = 0; i < n - 1; i++) {
                builder.append(  "1/" + split[1] + "+");
            }
            builder.append(  "1/" + split[1]);
            System.out.println(builder);
        }
    }
}