class Solution{
//Function to swap two elements in the array.
public static void swap(int arr[], int x, int y){
//Use of a temporary variable to swap the elements.
int tmp = arr[x];
arr[x] = arr[y];
arr[y] = tmp;
}
//Function to sort the array into a wave-like array.
public static void convertToWave(int arr[], int n){
//Iterating over the array.
for(int i=0;i<n-1;i=i+2){
//Swapping two neighbouring elements at a time.
swap(arr, i, i+1);
}
return;
}
}