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Odd Even Pairs

Problem

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Our friend Monk was given an integer array $$A$$ of size $$N$$. He got a task to calculate the **Absolute Difference between the number of odd and even pairs** present in this array $$A$$.

A Pair of $$2$$ integers $$(i,j)$$ is called an odd pair, if $$i < j$$, and $$A[i]+A[j]$$ is not divisible by $$2$$. A pair of integers $$(i,j)$$ is called even, if $$i < j$$, and $$A[i]+A[j]$$ is divisible by $$2$$.

This task seems a little bit tricky to him, and wants you to help him out. Can you ?

**Input Format:**

The first Line contains an integer $$N$$ denoting the size of array. The next line contains $$N$$ space separated integers, where the $$i^{th}$$ integer denotes $$A[i]$$.

**Output Format** :

Print the required answer on a single line.

**Constraints:**

$$ 1 \le N \le 100000 $$

$$ 1 \le A[i] \le 100000$$

Explanation

Even pairs- (1,3) ==> 1

Odd Pairs- (1,2), (2,3) ==> 2

$$ Difference = absolute value (Odd Pairs -Even Pairs)==1 $$

Time Limit:
2.0 sec(s)
for each input file.

Memory Limit:
256 MB

Source Limit:
1024 KB

Marking Scheme:
Marks are awarded when all the testcases pass.

Allowed Languages:
C,
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JavaScript(Node.js),
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Lisp (SBCL),
Lua,
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Initializing Code Editor...

{"3285c86": "/pagelets/recommended-problems/algorithm/odd-even-pairs-4/", "3285c43": "/pagelets/suggested-problems/algorithm/odd-even-pairs-4/", "3285c71": "/pagelets/problems-hint/algorithm/odd-even-pairs-4/", "3285c21": "/pagelets/show-submission/algorithm/odd-even-pairs-4/", "3285c5b": "/pagelets/problem-author-tester/algorithm/odd-even-pairs-4/"}

{}

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