# Hackerrank - Plus Minus Solution

Given an array of integers, calculate the fractions of its elements that are *positive*, *negative*, and are *zeros*. Print the decimal value of each fraction on a new line.

**Note:** This challenge introduces precision problems. The test cases are scaled to six decimal places, though answers with absolute error of up to are acceptable.

For example, given the array there are elements, two positive, two negative and one zero. Their ratios would be , and . It should be printed as

```
0.400000
0.400000
0.200000
```

**Function Description**

Complete the *plusMinus* function in the editor below. It should print out the ratio of positive, negative and zero items in the array, each on a separate line rounded to six decimals.

plusMinus has the following parameter(s):

*arr*: an array of integers

**Input Format**

The first line contains an integer, , denoting the size of the array.

The second line contains space-separated integers describing an array of numbers .

**Constraints**

**Output Format**

You must print the following lines:

- A decimal representing of the fraction of
*positive*numbers in the array compared to its size. - A decimal representing of the fraction of
*negative*numbers in the array compared to its size. - A decimal representing of the fraction of
*zeros*in the array compared to its size.

**Sample Input**

```
6
-4 3 -9 0 4 1
```

**Sample Output**

```
0.500000
0.333333
0.166667
```

**Explanation**

There are positive numbers, negative numbers, and zero in the array.

The proportions of occurrence are positive: , negative: and zeros: .

```
#!/bin/python3
import math
import os
import random
import re
import sys
# Complete the plusMinus function below.
def plusMinus(arr):
positive, negative, zeroes = 0,0,0
for i in arr:
if i>0:
positive+=1
elif i<0:
negative+=1
else:
zeroes+=1
print("%.6f" %(positive/len(arr)))
print("%.6f" %(negative/len(arr)))
print("%.6f" %(zeroes/len(arr)))
if __name__ == '__main__':
n = int(input())
arr = list(map(int, input().rstrip().split()))
plusMinus(arr)
```