Given an m x n binary matrix mat, return the length of the longest line of consecutive one in the matrix.
The line could be horizontal, vertical, diagonal, or anti-diagonal.
Example 1:
Input: mat = [[0,1,1,0],[0,1,1,0],[0,0,0,1]] Output: 3
Example 2:
Input: mat = [[1,1,1,1],[0,1,1,0],[0,0,0,1]] Output: 4
Constraints:
m == mat.lengthn == mat[i].length1 <= m, n <= 1041 <= m * n <= 104mat[i][j]is either0or1.