refactor: add Kotlin solution for 253. Meeting Rooms II

Author: technophilist

kotlin/0253-meeting-rooms-ii.kt

@@ -0,0 +1,18 @@
+class Solution {
+    fun minMeetingRooms(intervals: Array<IntArray>): Int {
+        val startTimes = intervals.map { it.first() }.sorted()
+        val endTimes = intervals.map { it.last() }.sorted()
+        var (startIndex, endIndex) = Pair(0, 0)
+        var minMeetingRooms = 0
+        while (startIndex in startTimes.indices) {
+            if (startTimes[startIndex] < endTimes[endIndex]) {
+                minMeetingRooms++
+                startIndex++
+            } else {
+                startIndex++
+                endIndex++
+            }
+        }
+        return minMeetingRooms
+    }
+}