Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements.
Example:
Input:[0,1,0,3,12]Output:[1,3,12,0,0]
Note:
<li>You must do this <b>in-place</b> without making a copy of the array.</li>
<li>Minimize the total number of operations.</li>