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Reshape the Matrix
EASY
10 mins
3 upvotes
Matrices (2D Arrays)
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Reshape the Matrix

Contributed by
Himanshu Airan
Easy
yellow-spark
0/40
Avg time to solve 10 mins
Success Rate 70 %
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3 upvotes

Problem Statement

One of your friends started working at a toy store, and today is his first day. He gets a box of some toys. The box looks like a grid 'B' consisting of 'N' rows and 'M' columns, and each cell has exactly one toy. His task is to arrange these toys on the shelf 'S' in front of him, which is empty. The shelf has 'R' rows and 'C' columns. Help your friend to arrange the toys on the shelf 'S' in the same row-order traversal as in the box 'B'.

You are given the box arrangement of toys in a matrix of size 'N * M' where values in the matrix are integers and denote the IDs of toys. Your task is to return a matrix of size 'R * C' denoting the shelf arrangement of toys.

After arranging the toys on the shelf 'S', if any toy remains in the box or any cell remains empty in the shelf, return the given box arrangement.

Example :
N = 2
M = 2
B = [ [1, 2], [3, 4] ]
R = 1
C = 4

Both arrangements (box and shelf) are shown below:

Return [ [1, 2, 3, 4] ] as our final answer.
Detailed explanation ( Input/output format, Notes, Constraints, Images )
Sample Input 1 :
2
2 4
5 0 3 2
1 5 5 3
4 2
3 3
3 2 6
1 2 3
5 1 9
2 4
Sample Output 1 :
5 0
3 2
1 5
5 3
3 2 6
1 2 3
5 1 9
Explanation for Sample Input 1 :
For test case 1:
Given matrix 'B' is [ [5, 0, 3, 2], [1, 5, 5, 3] ]. Converting it to a matrix of size 4*2 will look as 'S' = [ [5, 0], [3, 2], [1, 5], [5, 3] ].

For test case 2:
After arrangement on the shelf, one toy (with toy ID = 9) remains in the box. Shown in the below image.

Hence return the given matrix 'B' as the final answer.
Sample Input 2 :
2
3 3
4 -1 3
2 2 -2
1 3 1
3 5
3 4
5 2 4 7
6 3 4 2
3 7 5 6
2 6
Sample Output 2 :
4 -1 3
2 2 -2
1 3 1
5 2 4 7 6 3
4 2 3 7 5 6
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