Given an array and split it from a specified position, and move the first part of array add to the end.
Examples:
Input : arr[] = {12, 10, 5, 6, 52, 36}
k = 2
Output : arr[] = {5, 6, 52, 36, 12, 10}
Explanation : Split from index 2 and first
part {12, 10} add to the end .
Input : arr[] = {3, 1, 2}
k = 1
Output : arr[] = {1, 2, 3}
Explanation : Split from index 1 and first
part add to the end.
A O(n*k) solution is discussed here.
This problem can be solved in O(n) time using the reversal algorithm discussed below,
1. Reverse array from 0 to n – 1 (where n is size of the array).
2. Reverse array from 0 to n – k – 1.
3. Reverse array from n – k to n – 1.
Python3
# Python3 program to Split the array # and add the first part to the end # Function to reverse arr[] # from index start to end*/ def rvereseArray(arr, start, end): while start < end : temp = arr[start] arr[start] = arr[end] arr[end] =temp start += 1 end -= 1 # Function to print an array def printArray(arr, n) : for i in range(n): print(arr[i], end = " ") # Function to left rotate # arr[] of size n by k */ def splitArr(arr, k, n): rvereseArray(arr, 0, n - 1) rvereseArray(arr, 0, n - k - 1) rvereseArray(arr, n - k, n - 1) # Driver Code arr = [12, 10, 5, 6, 52, 36] n = len(arr) k = 2splitArr(arr, k, n) printArray(arr, n) # This code is contributed # by Shrikant13 |
Output:
5 6 52 36 12 10
Please refer complete article on Split the array and add the first part to the end | Set 2 for more details!
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