做网站怎么找客户,友情链接交易平台,对中国建设银行网站的优点,做网站什么费用★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★➤微信公众号#xff1a;山青咏芝#xff08;shanqingyongzhi#xff09;➤博客园地址#xff1a;山青咏芝#xff08;https://www.cnblogs.com/strengthen/#xff09;➤GitHub地址山青咏芝shanqingyongzhi➤博客园地址山青咏芝https://www.cnblogs.com/strengthen/➤GitHub地址https://github.com/strengthen/LeetCode➤原文地址https://www.cnblogs.com/strengthen/p/10214231.html ➤如果链接不是山青咏芝的博客园地址则可能是爬取作者的文章。➤原文已修改更新强烈建议点击原文地址阅读支持作者支持原创★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★ A strobogrammatic number is a number that looks the same when rotated 180 degrees (looked at upside down). Write a function to determine if a number is strobogrammatic. The number is represented as a string. Example 1: Input: 69
Output: trueExample 2: Input: 88
Output: true Example 3: Input: 962
Output: false strobogramatic数字是旋转180度时看起来相同的数字上下颠倒。 写一个函数来确定一个数字是否是频闪的。数字用字符串表示。 例1 输入“69” 输出true 例2 输入“88” 输出真 例3 输入“962” 输出false 1 class Solution {2 func isStrobogrammatic(_ num:String) - Bool {3 var m:[Character:Character] [0:0,1:1,8:8,6:9,9:6]4 let len num.count5 for i in 0...len/26 {7 if m[num[i]] ! num[len - i - 1]8 {9 return false
10 }
11 }
12 return true
13 }
14 }
15
16 extension String {
17 //subscript函数可以检索数组中的值
18 //直接按照索引方式截取指定索引的字符
19 subscript (_ i: Int) - Character {
20 //读取字符
21 get {return self[index(startIndex, offsetBy: i)]}
22 }
23 } 转载于:https://www.cnblogs.com/strengthen/p/10214231.html
