From cfbf9df8067ce7cd678dd2514d074ffcdaab90b5 Mon Sep 17 00:00:00 2001
From: Ukj0ng <90972240+Ukj0ng@users.noreply.github.com>
Date: Fri, 12 Sep 2025 16:00:02 +0900
Subject: [PATCH] =?UTF-8?q?[20250912]=20BOJ=20/=20G4=20/=20RGB=EA=B1=B0?=
 =?UTF-8?q?=EB=A6=AC=202=20/=20=ED=95=9C=EC=A2=85=EC=9A=B1?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 ...2 BOJ G4 RGB\352\261\260\353\246\254 2.md" | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 "Ukj0ng/202509/12 BOJ G4 RGB\352\261\260\353\246\254 2.md"

diff --git "a/Ukj0ng/202509/12 BOJ G4 RGB\352\261\260\353\246\254 2.md" "b/Ukj0ng/202509/12 BOJ G4 RGB\352\261\260\353\246\254 2.md"
new file mode 100644
index 00000000..438a6d49
--- /dev/null
+++ "b/Ukj0ng/202509/12 BOJ G4 RGB\352\261\260\353\246\254 2.md"	
@@ -0,0 +1,70 @@
+```
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static final int INF = 1000010;
+    private static int[][] cost, dp;
+    private static int N;
+
+    public static void main(String[] args) throws IOException {
+        init();
+
+        int answer = Integer.MAX_VALUE;
+        for (int i = 0; i < 3; i++) {
+            DP(i);
+
+            for (int j = 0; j < 3; j++) {
+                answer = Math.min(answer, dp[N-1][j]);
+            }
+        }
+
+        bw.write(answer + "\n");
+        bw.flush();
+        bw.close();
+        br.close();
+
+    }
+
+    private static void init() throws IOException {
+        N = Integer.parseInt(br.readLine());
+
+        cost = new int[N][3];
+        dp = new int[N][3];
+
+        for (int i = 0; i < N; i++) {
+            StringTokenizer st = new StringTokenizer(br.readLine());
+            for (int j = 0; j < 3; j++) {
+                cost[i][j] = Integer.parseInt(st.nextToken());
+            }
+        }
+    }
+
+    private static void DP(int start) {
+        for (int i = 0; i < N; i++) Arrays.fill(dp[i], INF);
+
+        dp[0][start] = cost[0][start];
+
+        for (int i = 1; i < N-1; i++) {
+            dp[i][0] = cost[i][0] + Math.min(dp[i-1][1], dp[i-1][2]);
+            dp[i][1] = cost[i][1] + Math.min(dp[i-1][0], dp[i-1][2]);
+            dp[i][2] = cost[i][2] + Math.min(dp[i-1][0], dp[i-1][1]);
+        }
+
+        for (int i = 0; i < 3; i++) {
+            if (i == start) continue;
+
+            int min = INF;
+
+            for (int j = 0; j < 3; j++) {
+                if (i == j) continue;
+                min = Math.min(min, dp[N-2][j]);
+            }
+
+            dp[N-1][i] = cost[N-1][i] + min;
+        }
+    }
+}
+```