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★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★ Given two strings In one conversion you can convert all occurrences of one character in Return Example 1: Input: str1 = 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 = false
Explanation: There is no way to transform str1 to str2.
Note:
给出两个长度相同的字符串,分别是 每一次转化时,将会一次性将 只有在字符串 示例 1: 输入:str1 = "aabcc", str2 = "ccdee" 输出:true 解释:将 'c' 变成 'e',然后把 'b' 变成 'd',接着再把 'a' 变成 'c'。注意,转化的顺序也很重要。 示例 2: 输入:str1 = "leetcode", str2 = "codeleet" 输出:false 解释:我们没有办法能够把 str1 转化为 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扩展 46 extension Character 47 { 48 //Character转ASCII整数值(定义小写为整数值) 49 var ascii: Int { 50 get { 51 return Int(self.unicodeScalars.first?.value ?? 0) 52 } 53 } 54 }
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