[BOJ 17413] 단어 뒤집기2 (java)

문제 링크 https://www.acmicpc.net/problem/17413

문제 풀이

package basics_200;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Stack;

public class BOJ17413 {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		Stack<Character> stack = new Stack<Character>();
		StringBuilder sb = new StringBuilder();

		String s = br.readLine() + "\n";
		boolean open = false;

		for (int i = 0; i < s.length(); i++) {
			if (s.charAt(i) == '<') {
				while (!stack.isEmpty()) {
					sb.append(stack.pop());
				}
				sb.append(s.charAt(i));
				open = true;
			} else if (s.charAt(i) == '>') {
				sb.append(s.charAt(i));
				open = false;

			} else {
				if (open == true) {
					sb.append(s.charAt(i));

				} else {
					if (s.charAt(i) == ' ' || s.charAt(i) == '\n') {
						while (!stack.isEmpty()) {
							sb.append(stack.pop());
						}
						if (s.charAt(i) == ' ') {
							sb.append(' ');
						}
					} else {
						stack.push(s.charAt(i));
					}
				}
			}
		}
		System.out.println(sb);

	}

}