Moments of growth

[내 코드] class Solution { fun solution(x: Int, n: Int): LongArray { var answer = longArrayOf() for(i in 1..n){ answer += (x.toLong()*i) } return answer } } [다른 사람 풀이] class Solution { fun solution(x: Int, n: Int): LongArray = LongArray(n) { x.toLong() * (it + 1) } } var a = IntArray(2){ it } a는 [0,1]