백준 10992번: 별 찍기 - 17 자바

 

 

 

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.IOException;
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 num = Integer.parseInt(br.readLine());
        br.close();
       
        for(int i = 1; i <= num; i++) {
        	if(i == num) {
        		for(int q = 1; q <= num*2-1; q++) {
        			bw.write("*");
        		}
        		break;
        	}
        	
        	for(int j = 1; j <= num - i; j++) {
        		bw.write(" ");
        	}
        	for(int k = 1; k <= 2*i-1; k++) {        		
        		
        		if(k == 1 || k == 2*i-1) {
        			bw.write("*");
        		}else {
        			bw.write(" ");
        		}
        	}
        	bw.write("\n");
        }
        	        
        bw.flush();
        bw.close();
	}
	
}