leetcode1.kt

class Solution {
    fun isIsomorphic(s: String, t: String): Boolean {
        return listWithNumber(s.toCharArray()) == listWithNumber(t.toCharArray())
    }
    
    fun listWithNumber(arr: CharArray): List<Int> {
        val intList: MutableList<Int> = mutableListOf()
        val symbols: MutableMap<Char, Int> = mutableMapOf()
        var counter: Int = 0
        for( i in arr){
            symbols.putIfAbsent(i, ++counter)
            intList.add(symbols.get(i)!!)
        }
        return intList
    }
}