문제https://www.acmicpc.net/problem/2981풀이(45분)import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.IOException;import java.util.Arrays;import java.util.ArrayList;import java.util.List;import java.util.Collections;public class Main { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamR..