g1501_1600.s1591_strange_printer_ii

Class Solution

java.lang.Object

g1501_1600.s1591_strange_printer_ii.Solution

public class Solution
extends Object

1591 - Strange Printer II.

Hard

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.

Constraints:

• m == targetGrid.length
• n == targetGrid[i].length
• 1 <= m, n <= 60
• 1 <= targetGrid[row][col] <= 60

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
boolean	isPrintable(int[][] targetGrid)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

isPrintable

public boolean isPrintable(int[][] targetGrid)