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question_12.cpp
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question_12.cpp
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/*
==> Swap kth elements <==
Question Link:- https://practice.geeksforgeeks.org/problems/swap-kth-elements5500/1?page=1&difficulty[]=-2&category[]=Arrays&sortBy=submissions
Given an array Arr of size N, swap the Kth element from beginning with Kth element from end.
Example 1:
Input:
N = 8, K = 3
Arr[] = {1, 2, 3, 4, 5, 6, 7, 8}
Output: 1 2 6 4 5 3 7 8
Explanation: Kth element from beginning is
3 and from end is 6.
Example 2:
Input:
N = 5, K = 2
Arr[] = {5, 3, 6, 1, 2}
Output: 5 1 6 3 2
Explanation: Kth element from beginning is
3 and from end is 1.
*/
#include <iostream>
using namespace std;
void printArray( int arr [], int n ) {
for ( int i = 0; i < n; i++ ) cout << arr[i] << " ";
cout << endl;
}
void swapKth(int *arr, int n, int k) {
int temp = arr[k-1];
arr[k-1] = arr[n-k];
arr[n-k] = temp;
}
int main () {
int arr [] = {1, 2, 3, 4, 5, 6, 7, 8};
swapKth(arr, 8, 3);
printArray(arr, 8);
return 0;
}