[20250928] BOJ / G5 / 알약 / 이준희

Author: JHLEE325

JHLEE325/202509/28 BOJ G5 알약.md

@@ -0,0 +1,42 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    
+    static long[][] dp = new long[31][31];
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringBuilder sb = new StringBuilder();
+
+        while (true) {
+            int n = Integer.parseInt(br.readLine());
+            if (n == 0) {
+                break;
+            }
+            sb.append(countPills(n, 0)).append("\n");
+        }
+        System.out.print(sb);
+    }
+    
+    static long countPills(int w, int h) {
+        if (dp[w][h] != 0) {
+            return dp[w][h];
+        }
+        
+        if (w == 0) {
+            return 1;
+        }
+
+        long result = countPills(w - 1, h + 1);
+        
+        if (h > 0) {
+            result += countPills(w, h - 1);
+        }
+
+        dp[w][h] = result;
+        return result;
+    }
+}
+```