def plusMinus(arr):
    positives, negatives, zeros = 0, 0, 0
    total = len(arr)
    for i in arr:
        if i < 0:
            negatives += 1
        elif i == 0:
            zeros += 1
        else:
            positives += 1
    print(f"{(positives/total):.6f}")
    print(f"{(negatives/total):.6f}")
    print(f"{(zeros/total):.6f}")