Problem 2320. Pandigital number n°2 (Inspired by Project Euler 32)
Instructions are incorrect. The instructions ask for pandigitals between the bounds, but at least the lower bound must be included to pass some of the tests.
Kind of tailored to the orders of magnitude approach of the test suite; complexity would have to increase significantly if you split the intervals say [10000 50000] instead of [1e4 1e5-1].
this is not really a general solution, perhaps you could add more complicated cases in the testsuite? for example pandigital_nb(2200,4000)==10, pandigital_nb(250,40000)==98, pandigital_nb(35327,43854637)==23030
I hesitated to add tests that I can't solve by myself.
I see, check solution 443089, that should be a general and relatively fast solution
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