- Prepare
- Algorithms
- Warmup
- Plus Minus

# Plus Minus

# Plus Minus

Given an array of integers, calculate the ratios of its elements that are *positive*, *negative*, and *zero*. Print the decimal value of each fraction on a new line with places after the decimal.

**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.

**Example**

There are elements, two positive, two negative and one zero. Their ratios are , and . Results are printed as:

```
0.400000
0.400000
0.200000
```

**Function Description**

Complete the *plusMinus* function in the editor below.

plusMinus has the following parameter(s):

*int arr[n]*: an array of integers

**Print**

Print the ratios of positive, negative and zero values in the array. Each value should be printed on a separate line with digits after the decimal. The function should not return a value.

**Input Format**

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

The second line contains space-separated integers that describe .

**Constraints**

**Output Format**

**Print** the following lines, each to decimals:

- proportion of positive values
- proportion of negative values
- proportion of zeros

**Sample Input**

```
STDIN Function
----- --------
6 arr[] size n = 6
-4 3 -9 0 4 1 arr = [-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: .