В чем беда не пойму ?
package com.javarush.task.task07.task0712;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
/*
Самые-самые
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
ArrayList<String> list = new ArrayList<String>();
for (int i = 0; i < 10; i++){
list.add(reader.readLine());
}
int min = list.get(0).length();
int max = list.get(0).length();
for (int i = 0; i < 9; i++){
if (list.get(i+1).length() < min)
min = list.get(i+1).length();
}
for (int i = 0; i < 9; i++){
if (list.get(i+1).length() > max)
max = list.get(i+1).length();
}
ArrayList<String> list1 = new ArrayList<String>();
for (int i = 1; i < 10; i++){
if ((list.get(i).length() == min) || (list.get(i).length() == max)){
list1.add(list.get(i));
}
}
System.out.println(list1.get(0));
}
}