Feat: 253. Meeting Rooms II

Author: HC-kang

meeting-rooms-ii/HC-kang.ts

@@ -0,0 +1,21 @@
+/**
+ * https://leetcode.com/problems/meeting-rooms-ii
+ * T.C. O(nlogn)
+ * S.C. O(n)
+ */
+function minMeetingRooms(intervals: number[][]): number {
+  const starts = intervals.map((interval) => interval[0]).sort((a, b) => a - b);
+  const ends = intervals.map((interval) => interval[1]).sort((a, b) => a - b);
+
+  let rooms = 0;
+  let endIdx = 0;
+  for (let i = 0; i < starts.length; i++) {
+    if (starts[i] < ends[endIdx]) {
+      rooms++;
+    } else {
+      endIdx++;
+    }
+  }
+
+  return rooms;
+}