New update is available. Click here to update.

Solve problems & track your progress

Checkout your overall progress in every topic here

Become

Sensei

in DSA topics

Open the topic and solve more problems associated with it to improve your skills

Check out the skill meter for every topic

See how many problems you are left with to solve for cracking any stage. Score more than zero to get your progress counted.

Problem

Submissions

Reshape the Matrix

Contributed by

Himanshu Airan

Easy

0/40

Avg time to solve 10 mins

Success Rate 70 %

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 )

Input Format :

The first line contains an integer 'T', denoting the number of test cases.
Then the test cases follow:

The first line of each test case contains two space-separated integers, 'N' and 'M', denoting the number of rows and columns in the box 'B', respectively.

The following 'N' lines contain 'M' integers, denoting the toys' IDs in box 'B'.

Next line contains two space-separated integers, 'R' and 'C', denoting the number of rows and columns in the shelf 'S', respectively.

Output Format :

For each test case, print a matrix of size 'R*C' denoting the toy's arrangement on the shelf 'S'.

Print the output of each test case in a new line.

Note :

You are not required to print the expected output. It has already been taken care of. Just implement the function.

Constraints :

1 <= 'T' <= 10
1 <= 'N', 'M', 'R', 'C' <= 100
-10^3 <= 'B[i][j]' <= 10^3

Time Limit: 1 sec

Sample Input 1 :

Sample Output 1 :

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 :

Sample Output 2 :

4 -1 3
2 2 -2
1 3 1
5 2 4 7 6 3
4 2 3 7 5 6

Auto

Console