How To Rotate An Array In Java? | Array Rotation | FREE DSA Course in JAVA | Lecture 66
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- čas přidán 2. 02. 2023
- We have to write a program to rotate an array in Java.
What does the rotation of the array mean?
Consider an array 1,2,3,4,5 Rotating this array by 1 in counterclockwise means the newly rotated array will be 2,3,4,5,1.
Similarly rotating this array by 2 counterclockwise means the newly rotated array will be 3,4,5,1,2.
So we have to write a program to rotate an array by a given number k where the positive value of k denotes counterclockwise rotation and negative values of denote clockwise rotation.
This is a basic program that is generally asked in some companies.
Let's check out how you can solve this question with the most efficient approach.
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if you try on array of 3 elements and rotations as -4, the above code will fail.
As 2nd call to reverse function --> reverse(a,-1,2), will fail as the array is out of bounds. As it can't start with index -1.
So any rotation to the right (-ve number), which is greater than the length of Array is going to fail with the above reason.
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public class Solution {
public int[] solve(int[] A, int B) {
B=B%A.length;
for(int j=1;j
if condition for b
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