2741. N찍 & 2742.N반대로찍

import java.io.*;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

		int cnt = Integer.parseInt(br.readLine());
		for (int i=1; i<=cnt ; i++){
			bw.write(i +"\n");
		}

		bw.flush();//남아있는 데이터를 모두 출력시킴
		bw.close();//스트림을 닫음
	}
}

 

1~CNT까지 찍기.

 

import java.io.*;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

		int cnt = Integer.parseInt(br.readLine());
		for (int i=cnt; i>0 ; i--){
			bw.write(i +"\n");
		}

		bw.flush();//남아있는 데이터를 모두 출력시킴
		bw.close();//스트림을 닫음
	}
}

역순 출력