fisher yates algorithm
import java.util.*;
public class Randomlyefficient{
public static void main(String[] args)
{
Random rand = new Random();
int[] list = new int[52];
for ( int i = 0; i < list.length; i++)
{
list[i] = i;
}
// System.out.println(Arrays.toString(list));
// System.out.println();
for ( int i = list.length - 1; i > 0; i--)
{
int temp = 0;
int n = rand.nextInt(i);
if ( n == i )
{
continue ;
}
else
{
temp = list[n];
list[n] = list[i];
list[i] = temp;
}
}
System.out.println(Arrays.toString(list));
}
/*Random rand = new Random();
int n = rand.nextInt(52);*/
}