[20251215] BOJ / G5 / 넴모넴모 (Easy) / 설진영

Author: llIllIllIllIllIllIllIllI

Seol-JY/202512/15 BOJ G5 넴모넴모 (Easy).md

@@ -0,0 +1,42 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    static int N, M;
+    static boolean[][] grid;
+    static long count = 0;
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+        grid = new boolean[N][M];
+        
+        backtrack(0);
+        System.out.println(count);
+    }
+
+    static void backtrack(int pos) {
+        if (pos == N * M) {
+            count++;
+            return;
+        }
+
+        int row = pos / M;
+        int col = pos % M;
+
+        grid[row][col] = false;
+        backtrack(pos + 1);
+
+        grid[row][col] = true;
+        if (row > 0 && col > 0 && grid[row-1][col] && grid[row][col-1] && grid[row-1][col-1]) {
+            grid[row][col] = false;
+            return;
+        }
+        backtrack(pos + 1);
+        grid[row][col] = false;
+    }
+}
+```