#!/bin/python3
import math
import os
import random
import re
import sys
#
# Complete the 'plusMinus' function below.
#
# The function accepts INTEGER_ARRAY arr as parameter.
#
def plusMinus(arr):
sumpositive=0
sumneg=0
sumzero=0
for i in range(0,len(arr)):
if arr[i]>0:
sumpositive+=1
elif arr[i]<0:
sumneg+=1
else:
sumzero+=1
dec1=sumpositive/len(arr)
dec2=sumneg/len(arr)
dec3=sumzero/len(arr)
print(round(dec1,6))
print(round(dec2,6))
print(round(dec3,6))
# Write your code here
if __name__ == '__main__':
n = int(input().strip())
arr = list(map(int, input().rstrip().split()))
plusMinus(arr)
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