From 6d5a0d0340798f773104f418d3db71797c5db717 Mon Sep 17 00:00:00 2001
From: Verolilo <57696907+Verolilo@users.noreply.github.com>
Date: Wed, 16 Feb 2022 10:22:19 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B00213.=E6=89=93=E5=AE=B6?=
 =?UTF-8?q?=E5=8A=AB=E8=88=8DII.md=20=E6=9B=B4=E7=AE=80=E6=B4=81=E7=9A=84p?=
 =?UTF-8?q?ython=20=E7=89=88=E6=9C=AC?=
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---
 problems/0213.打家劫舍II.md | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/problems/0213.打家劫舍II.md b/problems/0213.打家劫舍II.md
index b6c2d080..8e569e46 100644
--- a/problems/0213.打家劫舍II.md
+++ b/problems/0213.打家劫舍II.md
@@ -123,22 +123,24 @@ Python：
 ```Python
 class Solution:
     def rob(self, nums: List[int]) -> int:
-      if (n := len(nums)) == 0:
-        return 0
-      if n == 1:
-        return nums[0]
-      result1 = self.robRange(nums, 0, n - 2)
-      result2 = self.robRange(nums, 1, n - 1)
-      return max(result1 , result2)
+        #在198入门级的打家劫舍问题上分两种情况考虑
+        #一是不偷第一间房，二是不偷最后一间房
+        if len(nums)==1:#题目中提示nums.length>=1,所以不需要考虑len(nums)==0的情况
+            return nums[0]
+        val1=self.roblist(nums[1:])#不偷第一间房
+        val2=self.roblist(nums[:-1])#不偷最后一间房
+        return max(val1,val2)
 
-    def robRange(self, nums: List[int], start: int, end: int) -> int:
-      if end == start: return nums[start]
-      dp = [0] * len(nums)
-      dp[start] = nums[start]
-      dp[start + 1] = max(nums[start], nums[start + 1])
-      for i in range(start + 2, end + 1):
-        dp[i] = max(dp[i -2] + nums[i], dp[i - 1])
-      return dp[end]
+    def robRange(self,nums):
+        l=len(nums)
+        dp=[0]*l
+        dp[0]=nums[0]
+        for i in range(1,l):
+            if i==1:
+                dp[i]=max(dp[i-1],nums[i])
+            else:
+                dp[i]=max(dp[i-1],dp[i-2]+nums[i])
+        return dp[-1]
 ```
 
 javascipt: