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Last active July 4, 2019 16:59
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password-combos.md

How many passwords combinations can we find of length 3?

*    *    *

*    *    *

*    *    *

examples:

  • [0,0], [0,0], [0,0]
  • [2,1], [1,1], [0,1]

Constraint 1: all the combinations must be "adjacent"

Where "adjacent" means they're either up, down, left or right.

examples:

  • [0,0], [0,1], [1,1]
1----2    *
     |
*    3    *

*    *    *
  • [2,1], [1,1], [0,1]
*    3    *
     |
*    2    *
     |
*    1    *
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