[20251127] BOJ / G3 / 색상환 / 김민진

zinnnn37/202511/27 BOJ G3 색상환.md

@@ -0,0 +1,44 @@
+```java
+import java.io.*;
+
+public class BJ_G3_색상환 {
+
+    private static final int MOD = 1_000_000_003;
+
+    private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+
+    private static int N, K;
+    private static int[][] dp;
+
+    public static void main(String[] args) throws IOException {
+        init();
+        sol();
+    }
+
+    private static void init() throws IOException {
+        N = Integer.parseInt(br.readLine());
+        K = Integer.parseInt(br.readLine());
+
+        dp = new int[N + 1][K + 1];
+        for (int i = 0; i <= N; i++) {
+            dp[i][0] = 1;
+            if (i >= 1) dp[i][1] = i;
+        }
+    }
+
+    private static void sol() throws IOException {
+        for (int i = 4; i <= N; i++) {
+            for (int j = 2; j <= K; j++) {
+                dp[i][j] = (dp[i - 1][j] + dp[i - 2][j - 1]) % MOD;
+            }
+        }
+
+        bw.write(dp[N][K] + "");
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+}
+```