Create 0253-meeting-rooms-ii.swift

Author: drxlx

swift/0253-meeting-rooms-ii.swift

@@ -0,0 +1,23 @@
+class Solution {
+    func minMeetingRooms(_ intervals: [[Int]]) -> Int {
+        var start = intervals.map({ $0[0] }).sorted()
+        var end = intervals.map({ $0[1] }).sorted()
+        var res = 0
+        var count = 0
+        var s = 0
+        var e = 0
+
+        while s < intervals.count {
+            if start[s] < end[e] {
+                s += 1
+                count += 1
+            } else {
+                e += 1
+                count -= 1
+            }
+            res = max(res, count)
+        }
+
+        return res
+    }
+}