https://leetcode.com/problems/spiral-matrix-iii/description/

2D spiraling order #medium #matrix #simulation

https://leetcode.com/problems/count-unguarded-cells-in-the-grid/description/


Count unseen cells in 2D matrix with guards and walls #medium #matrix

https://leetcode.com/problems/flip-columns-for-maximum-number-of-equal-rows/description/


Max same-bit-rows after flipping columns in 01-2D matrix #medium #matrix

https://leetcode.com/problems/rotating-the-box/description/


Rotate matrix and simulate the fall #medium #matrix

https://leetcode.com/problems/painting-a-grid-with-three-different-colors/description


Ways to 3-color m*n grid, no adjucents #hard #dp #matrix