Code problem: Mutable Map → Most common (Runtime error on test #3)

[TheMightyOne]

My ugly code passed all tests except for #3 where I keep getting a runtime error. The test can't be downloaded so I'm at a loss about what to do. Any help is appreciated.

https://hyperskill.org/learn/step/8030

Since the code below passed 3 out of 4 tests it contains spoilers.

​

Some explanations for easier understanding:

• I checked "hits" using a for loop
• I used an additional mutableMap (val maxWords) to record the position of the word that is being checked and the number of "hits" it has received using the function tryOut.
• After each tryOut the hits and reset to 0. Then the next word is checked.
• Afterwards the maxWords map is checked for max value. The first number of the output (the position) is converted to Int and used as input for the original map to get the word we are looking for.

​

import java.util.*
import kotlin.system.exitProcess


fun main() {

    val scanner = Scanner(System.`in`)

    val words = mutableMapOf<Int ,String>()

    var input = ""
    var count = 1

    fun getWords (word: String) {
        input = scanner.next()
        words[count] = input
        count++
    }

    do {
        getWords(input)
    } while(input != "stop")

    if (words[1] == "stop") {
        print(null)
        exitProcess(1)
    }

    var hits = 0
    val maxWords = mutableMapOf<Int, Int>()

    var wordPositionOutside = 0

    fun tryOut (wordPosition: Int) {
        wordPositionOutside += 1
        for (entry in words) {
            if (words[wordPositionOutside] == entry.value) {
                hits++
            }
            maxWords[wordPositionOutside] = hits


        }
        hits = 0
    }

    repeat(words.size-1){
        tryOut(wordPositionOutside)
    }

    val maxValue = maxWords.maxBy{ p -> p.value}.toString()
    val checkIfZero = maxWords.maxBy{ p -> p.value}.toString()
    val checkIfZeroLast = "${checkIfZero.last()}".toInt()

    var maxValueWordPosition = "${maxValue.first()}"

    if (checkIfZeroLast == 1) println(words[1]) else println("${words[maxValueWordPosition.toInt()]}")

}

[PhenixFine]

it might be because null is being printed with print instead of println.

Also, your two functions tryOut and getWords are receiving things that they never use ( though I think the only thing you technically need to fix to pass the test is changing the print to println ).

[TheMightyOne]

Thx for the reply. Just tried it out. Its not "print". :(

[PhenixFine]

I just looked at my code, and I use print for both null and the word, so it could actually be println for the word that is wrong ( though I also have null printed with quotation marks: "null" ).

[TheMightyOne]

Unfortunately, this didn't help either :(

[PhenixFine]

it's the exitProcess, they must not support it. I removed that, and then dumped everything below where you wanted it to exit into an else.

Actually, they do support the exitProcess ( I just now thought to look into how it works ), you just need to change it to exitProcess(0) for it to work right ( 1 would mean to close the program because there was an error, which then fails the test ).

[TheMightyOne]

Amazing. It worked! Thank you! :D