def plusMinus(arr):
    n = 0
    p = 0
    z = 0
    l = len(arr)
    for x in arr:
        if x == 0:
            z+=1
        elif x > 0:
            p+=1
        else:
            n+=1
    
    [print(round(x,6)) for x in [float(p/l),float(n/l),float(z/l)]]