1+ #!/bin/python3
2+ 3+ # The function is expected to return a STRING.
4+ # The function accepts 2D_INTEGER_ARRAY matrix as parameter.
5+ # Input: [[1,2,3],[4,5,6],[7,8,9]]
6+ # output: [1,2,3,4,5,6,7,8,9]
7+ 8+ l = []
9+ def flatten_array (matrix ):
10+ return "," .join (flat (matrix , 0 , 0 ))
11+ 12+ def flat (matrix , row , col ):
13+ l .append (str (matrix [row ][col ]))
14+ if col == len (matrix [row ]) - 1 :
15+ if row == len (matrix ) - 1 :
16+ return l
17+ return flat (matrix , row + 1 , 0 )
18+ return flat (matrix , row , col + 1 )
19+ 20+ 21+ print ("Enter number of rows: " , end = "" )
22+ matrix_rows = int (input ().strip ())
23+ print ("Enter number of columns: " , end = "" )
24+ matrix_columns = int (input ().strip ())
25+ 26+ matrix = []
27+ print ("Enter matrix elements:" )
28+ for _ in range (matrix_rows ):
29+ matrix .append (list (map (int , input ().rstrip ().split ())))
30+ print ("Entered matrix is: " , matrix )
31+ 32+ result = flatten_array (matrix )
33+ print ("Resultant list: [" , end = "" )
34+ print (result , end = "" )
35+ print ("]" )
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