Getting Runtime Error

help
,
1

I was getting run time error on this code for this question :- NICEARRAY

fun main() {
    val n = readln().toInt() // T
    val result = mutableListOf<String>()

    var b : Long = 0
    var negativeNums = 0
    var positiveNums = 0

    for (k in 0 until  n) {
        val m = readln().split(' ') // m[1]
        val a = readln().split(' ') // N

        for(i in 0 until a.size) {
            b = b + (a[i].toLong()/m[1].toLong())

            if(a[i].toLong() % m[1].toLong() != 0.toLong()) {
                if(a[i].toLong() < 0.toLong())
                    negativeNums = negativeNums + 1
                else
                    positiveNums = positiveNums + 1
            }
        }
        if(b == 0.toLong())
            result.add("YES")
        else if(b < 0.toLong() && (positiveNums + b) >= 0.toLong()) {
            result.add("YES")
        } else if(b > 0.toLong() && (b - negativeNums) <= 0.toLong()) {
            result.add("YES")
        } else
            result.add("NO")

        b = 0
        negativeNums = 0
        positiveNums = 0
    }

    for (i in result)
        println(i)
}

Can someone please explain me why?