[Swift]LeetCode1153. 字符串转化 | String Transforms Into Another String
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?微信公眾號:為敢(WeiGanTechnologies)
?博客園地址:山青詠芝(https://www.cnblogs.com/strengthen/)
?GitHub地址:https://github.com/strengthen/LeetCode
?原文地址:https://www.cnblogs.com/strengthen/p/11333863.html?
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Given two strings?str1?and?str2?of the same length, determine whether you can transform?str1?into?str2?by doing?zero or more?conversions.
In one conversion you can convert?all?occurrences of one character in?str1?to?any?other lowercase English character.
Return?true?if and only if you can transform?str1?into?str2.
Example 1:
Input: str1 = "aabcc", str2 = "ccdee" Output: true Explanation: Convert 'c' to 'e' then 'b' to 'd' then 'a' to 'c'. Note that the order of conversions matter.Example 2:
Input: str1 = "leetcode", str2 = "codeleet" Output: false Explanation: There is no way to transform str1 to str2.Note:
給出兩個長度相同的字符串,分別是?str1?和?str2。請你幫忙判斷字符串?str1?能不能在?零次?或?多次?轉化后變成字符串?str2。
每一次轉化時,將會一次性將?str1?中出現的?所有?相同字母變成其他?任何?小寫英文字母(見示例)。
只有在字符串?str1?能夠通過上述方式順利轉化為字符串?str2?時才能返回?True,否則返回?False。??
示例 1:
輸入:str1 = "aabcc", str2 = "ccdee" 輸出:true 解釋:將 'c' 變成 'e',然后把 'b' 變成 'd',接著再把 'a' 變成 'c'。注意,轉化的順序也很重要。示例 2:
輸入:str1 = "leetcode", str2 = "codeleet" 輸出:false 解釋:我們沒有辦法能夠把 str1 轉化為 str2。提示:
72ms
1 class Solution { 2 func canConvert(_ str1: String, _ str2: String) -> Bool { 3 if str1 == str2 {return true} 4 let n:Int = str1.count 5 var arr:[Int] = [Int](repeating:-1,count:26) 6 let arrS:[Int] = Array(str1).map{$0.ascii} 7 let arrT:[Int] = Array(str2).map{$0.ascii} 8 for i in 0..<n 9 { 10 var x:Int = arrS[i] - 97 11 var y:Int = arrT[i] - 97 12 if arr[x] == -1 13 { 14 arr[x] = y 15 } 16 else if arr[x] != y 17 { 18 return false 19 } 20 } 21 var has:Int = 0 22 for i in 0..<26 23 { 24 if arr[i] != -1 25 { 26 has += 1 27 } 28 } 29 var flag:Int = 0 30 for i in 0..<26 31 { 32 for j in (i + 1)..<26 33 { 34 if arr[i] != -1 && arr[j] != -1 && arr[i] == arr[j] 35 { 36 flag = 1 37 } 38 } 39 } 40 if has != 26 || flag != 0 {return true} 41 return false 42 } 43 } 44 45 //Character擴展 46 extension Character 47 { 48 //Character轉ASCII整數值(定義小寫為整數值) 49 var ascii: Int { 50 get { 51 return Int(self.unicodeScalars.first?.value ?? 0) 52 } 53 } 54 }?
轉載于:https://www.cnblogs.com/strengthen/p/11333863.html
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