백준 1874 : 스택 수열 _자바 Java

https://www.acmicpc.net/problem/1874

1874번: 스택 수열

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import java.io.*;
import java.util.*;

public class Main {
	
	static Stack<Integer> st = new Stack<>();
	static int tmp=1;
	
	public static void main(String[] args) throws IOException {
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int C = Integer.parseInt(br.readLine());
		StringBuilder sb = new StringBuilder();
		
		for(int i=0;i<C;i++) {
			int N=Integer.parseInt(br.readLine());
			for(;tmp<=N;tmp++) {
				st.push(tmp);
				sb.append("+\n");
			}
			if(st.peek()==N) {
				st.pop();
				sb.append("-\n");
			}else {
				System.out.println("NO");
				return;
			}
		}
		
		System.out.println(sb);
	
	}
	
		
}