Решение

import java.io.BufferedReader
import java.io.BufferedWriter
import java.io.InputStreamReader
import java.io.OutputStreamWriter

fun main() {
    val reader = BufferedReader(InputStreamReader(System.`in`))
    val writer = BufferedWriter(OutputStreamWriter(System.out))

    val (troom, tcond) = reader.readLine().split(" ").map { it.toInt() }
    val mode = reader.readLine()

    val result = when (mode) {
        "freeze" -> if (troom > tcond) tcond else troom
        "heat" -> if (troom < tcond) tcond else troom
        "auto" -> tcond
        "fan" -> troom
        else -> troom
    }

    writer.write(result.toString())
    writer.newLine()
    reader.close()
    writer.close()
}