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].
Everything is perfect in this code.
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
Factorize THIS, buddy
Remove the two elements next to NaN value
intersection of matrices
Recycled Numbers (CodeJam Qualification Round 2012)
Find files with extension ext in the current directory
Find indices of diagonal elements
Magic is simple (for beginners)
Can you beat the lottery again (for hardcore coder) ?
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