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truly impressive
Thank you!
For problem 9, why did you exclude _ _ 0 and _ _ 2
ohh you represented the numbers right to left
The digits have to be in strictly increasing order, so for the cases of _ _ 0 and _ _ 2, the leading digit would have to be 0. This prevents it from being a 3-digit integer, so we don't consider them.
truly impressive
Thank you!
For problem 9, why did you exclude _ _ 0 and _ _ 2
ohh you represented the numbers right to left
The digits have to be in strictly increasing order, so for the cases of _ _ 0 and _ _ 2, the leading digit would have to be 0. This prevents it from being a 3-digit integer, so we don't consider them.