Merge pull request #1014 from AlgorithmWithGod/zinnnn37

[20251001] BOJ / G4 / 구슬게임 / 김민진

Author: ShinHeeEul

zinnnn37/202510/1 BOJ G4 구슬게임.md

@@ -0,0 +1,80 @@
+```java
+package etc;
+
+import java.io.*;
+import java.util.StringTokenizer;
+
+public class BJ_2600_구슬게임 {
+
+    private static final boolean A = true;
+    private static final boolean B = false;
+
+    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 StringBuilder sb = new StringBuilder();
+    private static StringTokenizer st;
+
+    private static int[] beads;
+    private static boolean[][] dp;
+
+    public static void main(String[] args) throws IOException {
+        init();
+        sol();
+    }
+
+    private static void init() throws IOException {
+        st = new StringTokenizer(br.readLine());
+
+        beads = new int[3];
+        for (int i = 0; i < 3; i++) {
+            beads[i] = Integer.parseInt(st.nextToken());
+        }
+
+        dp = new boolean[501][501];
+    }
+
+    private static void sol() throws IOException {
+        for (int i = 0; i < 501; i++) {
+            for (int j = 0; j < 501; j++) {
+                if (i == 0 && j == 0) {
+                    dp[i][j] = B;
+                    continue;
+                }
+
+                boolean whoWins = B;
+
+                // 첫 번째 구슬
+                for (int bead : beads) {
+                    if (i >= bead && !dp[i - bead][j]) {
+                        whoWins = A;
+                        break;
+                    }
+                }
+
+                // 두 번째 구슬
+                for (int bead : beads) {
+                    if (j >= bead && !dp[i][j - bead]) {
+                        whoWins = A;
+                        break;
+                    }
+                }
+
+                dp[i][j] = whoWins;
+            }
+        }
+        for (int i = 0; i < 5; i++) {
+            st = new StringTokenizer(br.readLine());
+
+            int a = Integer.parseInt(st.nextToken());
+            int b = Integer.parseInt(st.nextToken());
+
+            sb.append(dp[a][b] ? "A\n" : "B\n");
+        }
+        bw.write(sb.toString());
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+}
+```