Class Solution
java.lang.Object
g1401_1500.s1411_number_of_ways_to_paint_n_3_grid.Solution
public class Solution
extends java.lang.Object
1411 - Number of Ways to Paint N × 3 Grid.
Hard
You have a grid
of size n x 3
and you want to paint each cell of the grid with exactly one of the three colors: Red , **Yellow, ** or Green while making sure that no two adjacent cells have the same color (i.e., no two cells that share vertical or horizontal sides have the same color).
Given n
the number of rows of the grid, return the number of ways you can paint this grid
. As the answer may grow large, the answer must be computed modulo 109 + 7
.
Example 1:
Input: n = 1
Output: 12
Explanation: There are 12 possible way to paint the grid as shown.
Example 2:
Input: n = 5000
Output: 30228214
Constraints:
n == grid.length
1 <= n <= 5000
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Constructor Summary
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Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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Solution
public Solution()
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Method Details
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numOfWays
public int numOfWays(int n)
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