[20260117] BOJ / G5 / 알약 / 한종욱

Author: Ukj0ng

Ukj0ng/202601/17 BOJ G5 알약.md

@@ -0,0 +1,42 @@
+```
+import java.io.*;
+
+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 long[][] dp;
+    private static int N;
+
+    public static void main(String[] args) throws IOException {
+        init();
+
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static void init() throws IOException {
+        while (true) {
+            N = Integer.parseInt(br.readLine());
+            if (N == 0) return;
+
+            dp = new long[N+1][N+1];
+
+            for (int i = 0; i <= N; i++) {
+                dp[0][i] = 1;
+            }
+
+            for (int i = 1; i <= N; i++) {
+                for (int j = 0; j <= N; j++) {
+
+                    if (j+1 <= N)dp[i][j] += dp[i-1][j+1];
+
+                    if (j > 0) dp[i][j] += dp[i][j-1];
+                }
+            }
+
+            bw.write(dp[N][0] + "\n");
+        }
+    }
+}
+```