In a row of dominoes,
bottoms[i] represent the top and bottom halves of the
ith domino. (A domino is a tile with two numbers from 1 to 6 - one on each half of the tile.)
We may rotate the
ith domino, so that
bottoms[i] swap values.
Return the minimum number of rotations so that all the values in
tops are the same, or all the values in
bottoms are the same.
If it cannot be done, return
Input: tops = [2,1,2,4,2,2], bottoms = [5,2,6,2,3,2] Output: 2 Explanation: The first figure represents the dominoes as given by tops and bottoms: before we do any rotations. If we rotate the second and fourth dominoes, we can make every value in the top row equal to 2, as indicated by the second figure.
Input: tops = [3,5,1,2,3], bottoms = [3,6,3,3,4] Output: -1 Explanation: In this case, it is not possible to rotate the dominoes to make one row of values equal.
2 <= tops.length == bottoms.length <= 2 * 104
1 <= tops[i], bottoms[i] <= 6