Merge pull request #477 from AlgorithmWithGod/suyeun84

[20250716] BOJ / G5 / 강의실 배정 / 김수연

Author: ShinHeeEul

suyeun84/202507/16 BOJ G5 강의실 배정.md

@@ -0,0 +1,43 @@
+```java
+import java.util.*;
+import java.io.*;
+
+public class boj11000 {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringTokenizer st;
+    static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+    static int nextInt() {return Integer.parseInt(st.nextToken());}
+
+    public static void main(String[] args) throws Exception {
+        nextLine();
+        int N = nextInt();
+        int answer = 0;
+        PriorityQueue<Integer> rooms = new PriorityQueue<>();
+        Time[] lec = new Time[N];
+        for (int i = 0; i < N; i++) {
+            nextLine();
+            int S = nextInt();
+            int T = nextInt();
+            lec[i] = new Time(S, T);
+        }
+        Arrays.sort(lec, (o1, o2) -> {
+            if (o1.s == o2.s) return o1.e - o2.e;
+            else return o1.s - o2.s;
+        });
+        rooms.add(lec[0].e);
+        for (int i = 1; i < N; i++) {
+            if (rooms.peek() <= lec[i].s) rooms.poll();
+            rooms.add(lec[i].e);
+            answer = Math.max(answer, rooms.size());
+        }
+        System.out.println(answer);
+    }
+    static class Time {
+        int s, e;
+        public Time(int s, int e) {
+            this.s = s;
+            this.e = e;
+        }
+    }
+}
+```