Strange Printer II SOLUTION

Strange Printer II SOLUTION Biweekly Contest 35

There is an unusual printer with the accompanying two extraordinary prerequisites: 
On each turn, the printer will print a strong rectangular example of a solitary shading on the matrix. This will conceal the current hues in the square shape. 
When the printer has utilized a shading for the above activity, a similar shading can’t be utilized once more. 
You are given a m x n lattice targetGrid, where targetGrid[row][col] is the shading in the position (line, col) of the network. 
Return valid in the event that it is conceivable to print the lattice targetGrid, in any case, return bogus. 
Model 1: 
Info: targetGrid = [[1,1,1,1],[1,2,2,1],[1,2,2,1],[1,1,1,1]] 
Yield: valid 
Model 2: 
Info: targetGrid = [[1,1,1,1],[1,1,3,3],[1,1,3,4],[5,5,1,4]] 
Yield: valid 
Model 3: 
Info: targetGrid = [[1,2,1],[2,1,2],[1,2,1]] 
Yield: bogus 
Clarification: It is difficult to shape targetGrid on the grounds that it isn’t permitted to print similar shading in various turns. 
Model 4: 
Information: targetGrid = [[1,1,1],[3,1,3]] 
Yield: bogus 
m == targetGrid.length 
n == targetGrid[i].length 
1 <= m, n <= 60 
1 <= targetGrid[row][col] <= 60

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