1591. Strange Printer II

https://leetcode.com/problems/strange-printer-ii

Description

There is a strange printer with the following two special requirements:

• On each turn, the printer will print a solid rectangular pattern of a single color on the grid. This will cover up the existing colors in the rectangle.

• Once the printer has used a color for the above operation, the same color cannot be used again.

You are given a m x n matrix targetGrid, where targetGrid[row][col] is the color in the position (row, col) of the grid.

Return true if it is possible to print the matrix targetGrid, otherwise, return false.

Example 1:

**Input:** targetGrid = [[1,1,1,1],[1,2,2,1],[1,2,2,1],[1,1,1,1]]
**Output:** true

Example 2:

**Input:** targetGrid = [[1,1,1,1],[1,1,3,3],[1,1,3,4],[5,5,1,4]]
**Output:** true

Example 3:

**Input:** targetGrid = [[1,2,1],[2,1,2],[1,2,1]]
**Output:** false
**Explanation:** It is impossible to form targetGrid because it is not allowed to print the same color in different turns.

Example 4:

**Input:** targetGrid = [[1,1,1],[3,1,3]]
**Output:** false

Constraints:

• m == targetGrid.length

• n == targetGrid[i].length

• 1 <= m, n <= 60

• 1 <= targetGrid[row][col] <= 60

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