LeetCode

package LeetCode.contact;

import java.util.Arrays;

class Solution_1929 {
    public int[] getConcatenation(int[] nums) {
        int[] copy = new int[2 * (nums.length)];
        for(int i = 0; i < nums.length; i++ ){
        	copy[i] = nums[i];
        	copy[i+nums.length] = nums[i];
        }
        return copy;
    }
}
public class leetcode_1929 {
	public static void main(String[] args){
		Solution_1929 sol = new Solution_1929();
		int [] nums = new int[] {1,2,3,4};
		int a[] = sol.getConcatenation(nums);
		System.out.println(Arrays.toString(a));
		
	}


}