문제풀이 import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.*; interface Main { public static void main(String[] args) throws Exception { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringBuilder sb = new StringBuilder(); StringTokenizer st; int N = Integer.parseInt(br.readLine()); Stack stack = new Stack(); for(int j=1; j