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# Two teams?

Problem Description

There are A people numbered 1 to A in a football academy.
The coach of the academy wants to make two teams (not necessary of equal size) but unfortunately, not all people get along, and several refuse to be put on the same team as that of their enemies.

Given a 2-D array B of size `M x 2` denoting the enemies i.e B[i][0] and B[i][1] both are enemies of each other.

Return 1 if it possible to make exactly two teams else return 0.

Problem Constraints

2 <= A <= 105

1 <= M <= 105

1 <= B[i][0], B[i][1] <= A

B[i][0] != B[i][1]

Input Format

First argument is an integer A denoting number of peoples.

Second argument is a 2-D array B of size M x 2 denoting enemies.

Output Format

Return 1 if it possible to make exactly two teams else return 0.

Example Input

Input 1:

``` A = 5
B = [ [1, 2],
[2, 3],
[1, 5],
[2, 4] ] ```

Input 2:

``` A = 4
B = [ [1, 4],
[3, 1],
[4, 3],
[2, 1] ]
```

Example Output

Output 1:

` 1 `

Output 2:

` 0 `

Example Explanation

Explanation 1:

` We can make two teams [1, 3, 4] and [2, 5].`

Explanation 2:

` No possible way to create two teams. So, we need to return 0.`

NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a question? Checkout Sample Codes for more details.
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