Computer scienceProgramming languagesKotlinTypes and data structuresOperations with collections

Grouping collections

Theory

Harry and the Spell Power

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Harry Potter is learning different spells. He has a list of spells with their power values. He wants to group them by their power.

Sample Input 1: 

expetum-50 patronus-20 axio-50 lithigum-20 madriketom-70

Sample Output 1: 

{50=[Spell(name=expetum, power=50), Spell(name=axio, power=50)], 20=[Spell(name=patronus, power=20), Spell(name=lithigum, power=20)], 70=[Spell(name=madriketom, power=70)]}
Write a program in Kotlin
data class Spell(val name: String, val power: Int)

fun main() {
val input = readln().split(" ")
val spells = input.map { Spell(it.split("-")[0], it.split("-")[1].toInt()) }

// write your code here
val res =

println(res)
}
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