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同构字符串 #31

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@Mooo-star

给定两个字符串 s 和 t ,判断它们是否是同构的。

如果 s 中的字符可以按某种映射关系替换得到 t ,那么这两个字符串是同构的。

每个出现的字符都应当映射到另一个字符,同时不改变字符的顺序。不同字符不能映射到同一个字符上,相同字符只能映射到同一个字符上,字符可以映射到自己本身。

示例 1:

输入:s = "egg", t = "add"
输出:true
示例 2:

输入:s = "foo", t = "bar"
输出:false
示例 3:

输入:s = "paper", t = "title"
输出:true

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