Background

Description

Given an int array, return a new array with double the length where its last element is the same as the original array, and all the other elements are 0. The original array will be length 1 or more. Note: by default, a new int array contains all 0's.

Format

Input

Output

Samples

[4 5 6]

[0, 0, 0, 0, 0, 6]

[1 2]

[0, 0, 0, 2]

[3]

[0, 3]

Limitation

1s, 1024KiB for each test case.