Create 0056-merge-intervals.swift

Author: drxlx

swift/0056-merge-intervals.swift

@@ -0,0 +1,24 @@
+/**
+ * Question Link: https://leetcode.com/problems/merge-intervals/
+ */
+
+ class Solution {
+    func merge(_ intervals: [[Int]]) -> [[Int]] {
+        var intervals = intervals.sorted { $0[0] < $1[0] }
+        var res = [intervals[0]]
+
+        for interval in intervals {
+            let start = interval[0]
+            let end = interval[1]
+            let lastEnd = res[res.count - 1][1]
+
+            if start <= lastEnd {
+                res[res.count - 1][1] = max(lastEnd, end)
+            } else {
+                res.append([start, end])
+            }
+        }
+
+        return res
+    }
+}