[20260124] BOJ / G3 / 카드 게임 / 한종욱

Ukj0ng/202601/24 BOJ G3 카드 게임.md

@@ -0,0 +1,54 @@
+```
+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 int[][] dp;
+    private static int[] arr;
+    private static int N;
+
+    public static void main(String[] args) throws IOException {
+        int T = Integer.parseInt(br.readLine());
+
+        while (T-->0) {
+            init();
+            int answer = DP(1, N, true);
+            bw.write(answer + "\n");
+        }
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static void init() throws IOException {
+        N = Integer.parseInt(br.readLine());
+        arr = new int[N+1];
+        dp = new int[N+1][N+1];
+
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        for (int i = 1; i <= N; i++) {
+            arr[i] = Integer.parseInt(st.nextToken());
+            Arrays.fill(dp[i], -1);
+        }
+    }
+
+    private static int DP(int left, int right, boolean isGeunWoo) {
+        if (left > right) return 0;
+
+        if (dp[left][right] != -1) return dp[left][right];
+
+        if (isGeunWoo) {
+            int pickLeft = arr[left] + DP(left+1, right, false);
+            int pickRight = arr[right] + DP(left, right-1, false);
+            return dp[left][right] = Math.max(pickLeft, pickRight);
+        } else {
+            int pickLeft = DP(left+1, right, true);
+            int pickRight = DP(left, right-1, true);
+            return dp[left][right] = Math.min(pickLeft, pickRight);
+        }
+    }
+}
+```