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# Clone Graph

Problem Description

Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors.

Note: The test cases are generated in the following format (use the following format to use See Expected Output option):
First integer N is the number of nodes.
Then, N intgers follow denoting the label (or hash) of the N nodes.
Then, N2 integers following denoting the adjacency matrix of a graph, where Adj[i][j] = 1 denotes presence of an undirected edge between the ith and jth node, O otherwise.

Problem Constraints

1 <= Number of nodes <= 105

Input Format

First and only argument is a node A denoting the root of the undirected graph.

Output Format

Return the node denoting the root of the new clone graph.

Example Input

Input 1:

```      1
/ | \
3  2  4
/ \
5   6```

Input 2:

```      1
/ \
3   4
/   /|\
2   5 7 6```

Example Output

Output 1:

``` Output will the same graph but with new pointers:
1
/ | \
3  2  4
/ \
5   6```

Output 2:

```      1
/ \
3   4
/   /|\
2   5 7 6```

Example Explanation

Explanation 1:

` We need to return the same graph, but the pointers to the node should be different.`

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.
Hints
• Hint 1
• Solution Approach
• Complete Solution

## Discussion

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