[20250910] BOJ / G2 / 중앙값 구하기 / 김민진

Author: zinnnn37

zinnnn37/202509/10 BOJ G2 중앙값 구하기.md

@@ -0,0 +1,62 @@
+```java
+import java.io.*;
+import java.util.PriorityQueue;
+import java.util.Queue;
+import java.util.StringTokenizer;
+
+public class BJ_2696_중앙값_구하기 {
+
+	private static final BufferedReader  br = new BufferedReader(new InputStreamReader(System.in));
+	private static final BufferedWriter  bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	private static       StringTokenizer st;
+
+	private static int    T;
+	private static int    M;
+	private static String s;
+
+	private static Queue<Integer> minq;
+	private static Queue<Integer> maxq;
+
+	public static void main(String[] args) throws IOException {
+		sol();
+	}
+
+	private static void sol() throws IOException {
+		T = Integer.parseInt(br.readLine());
+
+		while (T-- > 0) {
+			M = Integer.parseInt(br.readLine());
+
+			s    = "";
+			minq = new PriorityQueue<>();
+			maxq = new PriorityQueue<>((a, b) -> b - a);
+			for (int i = 0; i < M; i++) {
+				if (i % 10 == 0) {
+					st = new StringTokenizer(br.readLine());
+				}
+
+				if (i % 2 == 0) {
+					maxq.offer(Integer.parseInt(st.nextToken()));
+				} else {
+					minq.offer(Integer.parseInt(st.nextToken()));
+				}
+
+				if (!minq.isEmpty() && maxq.peek() > minq.peek()) {
+					minq.offer(maxq.poll());
+					maxq.offer(minq.poll());
+				}
+
+				if (i % 2 == 0) {
+					s += maxq.peek() + (i > 2 && (i + 2) % 20 == 0 ? "\n" : " ");
+				}
+			}
+			bw.write(maxq.size() + "\n");
+			bw.write(s + "\n");
+		}
+		bw.flush();
+		bw.close();
+		br.close();
+	}
+
+}
+```