Left Rotations of An Array

Moderate

0/80

Average time to solve is 10m

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35 upvotes

Asked in companies

Problem statement

You are given an array consisting of 'N' elements and you need to perform 'Q' queries on the given array. Each query consists of an integer which tells the number of elements by which you need to left rotate the given array. For each query return the final array obtained after performing the left rotations.

Note:

Perform each query on the original array only i.e. every output should be according to the original order of elements.

Example:

Let the array be [1, 2, 3, 4, 5, 6] and the queries be {2, 4, 1}. For every query, we’ll perform the required number of left rotations on the array.

For the first query, rotate the given array to the left by 2 elements, so the resultant array is: [3, 4, 5, 6, 1, 2].

For the second query, rotate the given array to the left by 4 elements, so the resultant array is: [5, 6, 1, 2, 3, 4].

For the third query, rotate the given array to the left by 1 element, so the resultant array is: [2, 3, 4, 5, 6, 1].

Detailed explanation ( Input/output format, Notes, Images )

Input format:

The very first line of input contains an integer ‘T’ denoting the number of test cases. 

The first line of every test case contains two space-separated integers ‘N’ and ‘Q’ denoting the number of elements present in the array and the number of queries to be performed on the given array, respectively. 

The second line of every test case contains ‘N’ space-separated integers denoting the elements present in the array.

The third line of every test case contains ‘Q’ space-separated integers denoting the queries.

Output format:

For every query of each test case, return ‘N’ space-separated integers which denote the resultant array after performing the rotation.

Note:

You don't need to print anything, it has already been taken care of. Just implement the given function.

Constraints:

1 <= T <= 10 
1 <= N <= 1000
1 <= Q <= 100
0 <= Queries[i] <= 10^5
-10^5 <= Array[i] <= 10^5

Where 'Queries[i]' denotes the extent to which the array in each query needs to be rotated and 'Array[i]' denotes the array element.

Time limit: 1 sec

Sample Input 1:

Sample Output 1:

Explanation for Sample Output 1:

In test case 1, we have, array: [7, 8, 6, 1, 2] and three queries: {8, 4, 3}.

For the first query we rotate the given array to the left 8 times, so the resultant array is: [1, 2, 7, 8, 6].

For the second query we rotate the given array to the left 4 times, so the resultant array is: [2, 7, 8, 6, 1].

For the third query we rotate the given array to the left 3 times, so the resultant array is: [1, 2, 7, 8, 6].

In test case 2, we have, array: [12, 15] and two queries: {1, 2}.

For the first query we rotate the given array to the left 1 time, so the resultant array is: [15, 12].

For the second query we rotate the given array to the left 2 times, so the resultant array is: [12, 15].

Sample Input 2:

2
6 3
10 20 30 40 50 60
12 2 5
1 2
-15
100 89

Sample Output 2:

10 20 30 40 50 60 
30 40 50 60 10 20 
60 10 20 30 40 50 
-15
-15

Explanation for Sample Output 2:

In test case 1, we have, array: [10, 20, 30, 40, 50, 60] and three queries: {12, 2, 5}.

For the first query we rotate the given array to the left 12 times, so the resultant array is: [10, 20, 30, 40, 50, 60].

For the second query we rotate the given array to the left 2 times, so the resultant array is: [30, 40, 50, 60, 10, 20].

For the third query we rotate the given array to the left 5 times, so the resultant array is: [60, 10, 20, 30, 40, 50]

In test case 2, we have, array: [-15] and two queries: {100, 89}.

For the first query we rotate the given array to the left 100 times, so the resultant array is: [-15].

For the second query we rotate the given array to the left 89 times, so the resultant array is: [-15].

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