[20251106] BOJ / G5 / 하노이 탑 / 설진영

Author: Seol-JY

Seol-JY/202511/06 BOJ G5 하노이 탑.md

@@ -0,0 +1,33 @@
+```java
+import java.io.*;
+import java.math.BigInteger;
+
+public class Main {
+    static StringBuilder sb = new StringBuilder();
+    
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int n = Integer.parseInt(br.readLine());
+        
+        BigInteger moveCount = BigInteger.TWO.pow(n).subtract(BigInteger.ONE);
+        sb.append(moveCount).append('\n');
+        
+        if (n <= 20) {
+            hanoi(n, 1, 3, 2);
+        }
+        
+        System.out.print(sb);
+    }
+    
+    static void hanoi(int n, int from, int to, int aux) {
+        if (n == 1) {
+            sb.append(from).append(' ').append(to).append('\n');
+            return;
+        }
+        
+        hanoi(n - 1, from, aux, to);
+        sb.append(from).append(' ').append(to).append('\n');
+        hanoi(n - 1, aux, to, from);
+    }
+}
+```