Operator '==' cannot be applied to 'String?' and 'Int'

Good day! Help, please, deal with the problem.

Error output:

Operator ‘==’ cannot be applied to ‘String?’ and ‘Int’

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Code:

fun main() {
     println("Rock-paper-scissors on kotlin!")
     println("1 - rock, 2 - scissors, 3 - paper")
     print("Your choice:")
     val stringInput = readLine()
     val compInput = (1..3).random()
     if(stringInput == 3 && compInput == 1){
         println("Computer wins!")
     }
}

>Solution :

The number 3 and the string "3" are not the same thing.

Maybe you should replace it with stringInput == "3"