def plusMinus(arr: Array[Int]) {
    // Write your code here
    val n = arr.length
    var positiveCount, negativeCount, zeroCount = 0
    
    arr.map(elem => {
        if(elem > 0) positiveCount = positiveCount + 1
        else if(elem < 0) negativeCount = negativeCount + 1
        else zeroCount = zeroCount + 1
    })
    val positiveRatio = positiveCount.toFloat/n
    val negativeRatio = negativeCount.toFloat/n
    val zeroRatio = zeroCount.toFloat/n
    
        println(f"$positiveRatio%.6f")
        println(f"$negativeRatio%.6f")
        println(f"$zeroRatio%.6f")
    }
}