feat: add swift implementation to lcof problem: No.61 (#2953)

Author: klever34

lcof/面试题61. 扑克牌中的顺子/README.md

@@ -228,6 +228,30 @@ public class Solution {
 }
 ```
 
+#### Swift
+
+```swift
+class Solution {
+    func isStraight(_ nums: [Int]) -> Bool {
+        var vis = Array(repeating: false, count: 14)
+        var mi = 20, mx = -1
+        for x in nums {
+            if x == 0 {
+                continue
+            }
+            if vis[x] {
+                return false
+            }
+            vis[x] = true
+            mi = min(mi, x)
+            mx = max(mx, x)
+        }
+        return mx - mi <= 4
+    }
+}
+
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

lcof/面试题61. 扑克牌中的顺子/Solution.swift

@@ -0,0 +1,18 @@
+class Solution {
+    func isStraight(_ nums: [Int]) -> Bool {
+        var vis = Array(repeating: false, count: 14)
+        var mi = 20, mx = -1
+        for x in nums {
+            if x == 0 {
+                continue
+            }
+            if vis[x] {
+                return false
+            }
+            vis[x] = true
+            mi = min(mi, x)
+            mx = max(mx, x)
+        }
+        return mx - mi <= 4
+    }
+}