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  1. Practice
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  3. Cracking the Coding Interview
  4. Arrays: Left Rotation
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Arrays: Left Rotation

  • jacob0306 + 1 comment

    in case you need it! hope it help!

    import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {
    
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int k = in.nextInt();
        int a[] = new int[n];
        
        for(int a_i=0; a_i < n; a_i++){
            a[((n- (k%n))+a_i)%n] = in.nextInt();
        }
        for(int i = 0; i < n; i++)
            System.out.print(a[i] + " ");
      
        System.out.println();
      
    }
}
    • ngokli + 1 comment

      This is a good reason to start looping on the first element of the input, rather than the output.

      But the problem statement does say you are "Given an array" (not a stream).

      • jacob0306 + 1 comment

        Nah I did not add anything except changed the gived codes from a [a_i] = in.nextInt() to a[((n- (k%n))+a_i)%n] = in.nextInt()

        • adivishy + 0 comments

          can you pl explain a[((n- (k%n))+a_i)%n] = in.nextInt() st