From 2ddf04ff1432c5a3f0fdf81061913a5c7fcccd47 Mon Sep 17 00:00:00 2001
From: zhangrunzhe <zhangrunzhe@kkworld.com>
Date: Thu, 24 Oct 2024 18:04:48 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8F=B3=E6=97=8B=E5=AD=97=E7=AC=A6=E4=B8=B2?=
 =?UTF-8?q?=20swift=E7=89=88=E6=9C=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/kamacoder/0055.右旋字符串.md | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/problems/kamacoder/0055.右旋字符串.md b/problems/kamacoder/0055.右旋字符串.md
index 363d9ffa..2b32cb44 100644
--- a/problems/kamacoder/0055.右旋字符串.md
+++ b/problems/kamacoder/0055.右旋字符串.md
@@ -350,7 +350,29 @@ function reverseStr(s, start, end) {
 
 
 ### Swift:
+```swift
+func rotateWords(_ s: String, _ k: Int) -> String {
+    var chars = Array(s)
+    // 先反转整体
+    reverseWords(&chars, start: 0, end: s.count - 1)
+    // 反转前半段
+    reverseWords(&chars, start: 0, end: k - 1)
+    // 反转后半段
+    reverseWords(&chars, start: k, end: s.count - 1)
+    return String(chars)
+}
 
+// 反转start...end 的字符数组
+func reverseWords(_ chars: inout [Character], start: Int, end: Int) {
+    var left = start
+    var right = end
+    while left < right, right < chars.count {
+        (chars[left], chars[right]) = (chars[right], chars[left])
+        left += 1
+        right -= 1
+    }
+}
+```
 
 
 ### PHP：