feat: Add solution for LeetCode problem 252

Author: WhiteHyun

meeting-rooms/WhiteHyun.swift

@@ -0,0 +1,31 @@
+//  
+//  252. Meeting Rooms
+//  https://leetcode.com/problems/meeting-rooms/description/
+//  Dale-Study
+//  
+//  Created by WhiteHyun on 2024/05/12.
+//  
+
+
+/*
+Definition of Interval:
+class Interval {
+    var start: Int
+    var end: Int
+    init() { start = 0; end = 0; }
+    init(_ a: Int, _ b: Int) { start = a; end = b }
+}
+ */
+final class Solution {
+  func canAttendMeetings(_ intervals: [Interval]) -> Bool {
+    let sortedIntervals = intervals.sorted { lhs, rhs in
+      lhs.start < rhs.start
+    }
+
+    for i in sortedIntervals.indices.dropFirst() where sortedIntervals[i - 1].end > sortedIntervals[i].start {
+      return false
+    }
+
+    return true
+  }
+}