Given a matrix consists of 0 and 1, find the distance of the nearest 0 for each cell.
The distance between two adjacent cells is 1.
Example 1:
Input: [[0,0,0], [0,1,0], [0,0,0]] Output: [[0,0,0], [0,1,0], [0,0,0]]
Example 2:
Input: [[0,0,0], [0,1,0], [1,1,1]] Output: [[0,0,0], [0,1,0], [1,2,1]]
Note:
<li>The number of elements of the given matrix will not exceed 10,000.</li>
<li>There are at least one 0 in the given matrix.</li>
<li>The cells are adjacent in only four directions: up, down, left and right.</li>