function plusMinus(arr) {
    let n=arr.length;
    let max=0,min=0,zero=0,i;
    for(i=0; i<n; i++){
        if(0<arr[i]){
            max++;
        }
        else if(0>arr[i]){
            min++;
        }
        else if (arr[i]===0){
            zero++;
        }
    }
    
        console.log((max / n).toFixed(6));
        console.log((min/n).toFixed(6));
        console.log((zero/n).toFixed(6));

}