Count total number of digits from 1 to n.
since from [1-9] total 9 digits.[10-13] total 4*2=8 digits.
In the 5th test case there is number n=10000675820025; which is very large number MATLAB is not accepting to get number from 1 to 10000675820025;
that means u need to find some alternate way to solve
Back to basics 11 - Max Integer
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Edges of a n-dimensional Hypercube
Sum of logarithms
5 Prime Numbers
Tell your secret
Sky full of stars - 02
Generate Golomb's sequence
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