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Find duplicate rows in a binary matrix

Given a binary matrix A of integers 0 and 1, of size N x M.

Find and return the indices of the rows which are duplicate of rows which are already present in the matrix.

If row[i] and row[j] are same and i < j then answer will contain only index j.

Note: Rows are numbered from top to bottom and columns are numbered from left to right.
There will be at least one duplicate row in the matrix.

Input Format

The first argument given is the integer matrix A.

Output Format

Return the indices of the rows in the form of an integer array.


2 <= N, M <= 1000
0 <= A[i] <= 1

For Example

Input 1:
    A = [   [1, 0, 0]
            [0, 1, 0]
            [0, 1, 0]   ]
Output 1:

Input 2:
    A = [   [1, 1, 1, 0]
            [0, 0, 0, 1]
            [1, 1, 1, 0]
            [0, 0, 0, 1]    ]
Output 2:
    [3, 4]
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 doubt? Checkout Sample Codes for more details.
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