[20250204] BOJ / 실버2 / 별 찍기 - 22 / 권혁준

Author: oncsr

khj20006/202502/04 BOJ S2 별 찍기 - 22.md

@@ -0,0 +1,63 @@
+```java
+
+import java.util.*;
+import java.io.*;
+
+class Main {
+	
+	// IO field
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	static StringTokenizer st;
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static int nextInt() {return Integer.parseInt(st.nextToken());}
+	static long nextLong() {return Long.parseLong(st.nextToken());}
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+	
+	// Additional field
+
+	public static void main(String[] args) throws Exception {
+
+		int N = Integer.parseInt(br.readLine());
+		
+		if(N == 1) {
+			bw.write("*");
+			bwEnd();
+			return;
+		}
+		
+		char[][] ans = new char[4*N-1][4*N-3];
+		for(int i=0;i<4*N-1;i++) Arrays.fill(ans[i], ' ');
+		
+		int a = 0, b = 4*N-4, c = 4*N-2;
+		while(a<=b) {
+			for(int i=a;i<=b;i++) {
+				ans[a][i] = '*';
+				ans[c][i] = '*';
+			}
+			for(int i=a;i<=c;i++) {
+				ans[i][a] = '*';
+				ans[i][b] = '*';
+			}
+			if(a != 0) ans[a][b+1] = '*';
+			if(a != b) ans[a+1][b] = ' ';
+			a += 2;
+			b -= 2;
+			c -= 2;
+		}
+		
+		for(int i=0;i<4*N-1;i++) {
+			for(int j=0;j<4*N-3;j++) {
+				bw.write(ans[i][j]);
+				if(i == 1 && j == 0) break;
+			}
+			bw.write("\n");
+		}
+		
+		bwEnd();
+	}
+
+}
+
+```