🎉 feat: initial commit for leetcode 169 using Swift

Author: liuchuo

Swift/169. Majority Element.swift

@@ -0,0 +1,18 @@
+// 169. Majority Element
+// 60 ms
+var v = 0, res = 0
+var dict = [Int: Int]()
+nums.forEach {
+    var t = 1
+    if let n = dict[$0] {
+        t = n + 1
+    }
+
+    if t > v {
+        res = $0
+        v = t
+    }
+    dict[$0] = t
+}
+
+return res