From 559f03c92869ca55ae929d66de872f5ddda70567 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AD=9F=E4=BB=A4=E4=BB=A4?= <oraling@163.com>
Date: Fri, 8 Apr 2022 18:11:05 +0800
Subject: [PATCH] =?UTF-8?q?Update=200459.=E9=87=8D=E5=A4=8D=E7=9A=84?=
 =?UTF-8?q?=E5=AD=90=E5=AD=97=E7=AC=A6=E4=B8=B2.md?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0459.重复的子字符串.md | 43 ++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/problems/0459.重复的子字符串.md b/problems/0459.重复的子字符串.md
index ccfb485c..6a9b4260 100644
--- a/problems/0459.重复的子字符串.md
+++ b/problems/0459.重复的子字符串.md
@@ -421,5 +421,48 @@ function repeatedSubstringPattern(s: string): boolean {
 };
 ```
 
+
+Swift:
+
+> 前缀表统一减一
+```swift
+	func repeatedSubstringPattern(_ s: String) -> Bool {
+        
+        let sArr = Array(s)
+        let len = s.count
+        if len == 0 {
+            return false
+        }
+        var next = Array.init(repeating: -1, count: len)
+        
+        getNext(&next,sArr)
+        
+        if next.last != -1 && len % (len - (next[len-1] + 1)) == 0{
+            return true
+        }
+
+        return false
+    }
+    
+    func getNext(_ next: inout [Int], _ str:[Character]) {
+        
+        var j = -1
+        next[0] = j
+        
+        for i in 1 ..< str.count {
+            
+            while j >= 0 && str[j+1] != str[i] {
+                j = next[j]
+            }
+            
+            if str[i] == str[j+1] {
+                j += 1
+            }
+            
+            next[i] = j
+        }
+    }
+```
+
 -----------------------
 <div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>