https://codeperfectplus.com/plus-minus-problem-solving-hackerrank

Plus_Minus.py

def plusMinus(arr):
    countPositive = 0
    countNegative = 0
    n = len(arr)
    for i in range(n):
        if arr[i] > 0:
            countPositive += 1 
        elif arr[i] < 0:
            countNegative += 1
    countZero = n - countPositive-countNegative
    print(countPositive/n)
    print(countNegative/n)
    print(countZero/n)
    
if __name__ == '__main__':
    n = int(input())

    arr = list(map(int, input().rstrip().split()))

    plusMinus(arr)