2128. Remove All Ones With Row and Column Flips π
Description
You are given an m x n
binary matrix grid
.
In one operation, you can choose any row or column and flip each value in that row or column (i.e., changing all 0
's to 1
's, and all 1
's to 0
's).
Return true
if it is possible to remove all 1
's from grid
using any number of operations or false
otherwise.
Example 1:
Input: grid = [[0,1,0],[1,0,1],[0,1,0]] Output: true Explanation: One possible way to remove all 1's from grid is to: - Flip the middle row - Flip the middle column
Example 2:
Input: grid = [[1,1,0],[0,0,0],[0,0,0]] Output: false Explanation: It is impossible to remove all 1's from grid.
Example 3:
Input: grid = [[0]] Output: true Explanation: There are no 1's in grid.
Constraints:
m == grid.length
n == grid[i].length
1 <= m, n <= 300
grid[i][j]
is either0
or1
.
Solutions
Solution 1
1 2 3 4 5 6 7 |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 |
|