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Array Reversal. Given an array, of size , reverse it. Example: If array, , after reversing it, the array should be, . The first line contains an integer, , denoting the size of the array. The next line contains space-separated integers denoting the elements of the array. , where is the element of the array.
You can reverse array in two ways. Either by fetching elements from last to start index and putting elements into new array. for example. int[] b = new int[n]; for(int i = n-1; i>=0 ; i--){. n[i] = arrayTobeReverse[i]; }
3 days ago · Array Reverse in C/C++/Java/Python/JavaScript. Given an array (or string), the task is to reverse the array/string. Examples: Input: original_array [] = {1, 2, 3} Output: array_reversed [] = {3, 2, 1} Input: original_array [] = {4, 5, 1, 2} Output: array_reversed [] = {2, 1, 5, 4}
May 9, 2021 · In this HackerRank Arrays - DS problem, we need to develop a program that can take an integer array as input and then reverse it. also, we need to make a reveseArray function that can return the reverse array. For example if we give input arr = [2,3,5] then it must return [5,3,2].
Apr 8, 2022 · There are numerous approaches to reverse an array in Java. These are: Using Temp array. Using Swapping. Using Collections.reverse () method. Using StringBuilder.append () method. 1. Using Temp array. The first method is as follows: Take input the size of the array and the elements of the array.
Apr 13, 2021 · Problem link: https://www.hackerrank.com/challenges/arrays-ds/problem
Solution:- #include <stdio.h> #include <stdlib.h> int main () { int num, a [1000], i, t; scanf ("%d", & num ); for( i = 0; i < num; i ++) { scanf ("%d",& a [ i ]); } /* logic to reverse the array.
reverseArray has the following parameter (s): int A [n]: the array to reverse. Returns. int [n]: the reversed array. Input Format. The first line contains an integer, , the number of integers in . The second line contains space-separated integers that make up . Constraints. Sample Input 1. Copy Download. Array: arr 1 4 3 2. 4. 1 4 3 2.
Most languages also have a method, attribute, or member that allows you to retrieve the size of an array. In Java, arrays have a attribute; in other words, you can get the length of some array, arrayName, by using the arrayName.length syntax.
Feb 13, 2023 · Reverse an array upto a given position. Last Updated : 13 Feb, 2023. Given an array arr [] and a position in array, k. Write a function name reverse (a [], k) such that it reverses subarray arr [0..k-1]. Extra space used should be O (1) and time complexity should be O (k).
