릿코드 205. Isomorphic Strings 코틀린

두 스트링이 같은구조인지 확인


정답

class Solution {
    fun isIsomorphic(s: String, t: String): Boolean {
        val firstString = isomorphicString(s)
        val secondString = isomorphicString(t)
        return firstString==secondString
    }

    private fun isomorphicString(s: String): String {
        var firstString = ""
        val stringMap = hashMapOf<Char, Int>()

        for (i in s.indices) {
            if (stringMap[s[i]] == null) {
                stringMap[s[i]] = 1000+i

            }
            firstString = firstString.plus(stringMap[s[i]])
        }
        return firstString
    }
}