1185 - Big Number

Difficulty : easy

Solution Description :

Math problem

you can use log10() method for calculate digit
you need to pregenerate 10^7 value use a long type array 

example for calculate 5 is
d=0.0
for i=1 to 5
------d += log10(i)
so digit for 5 is ceiling of d

You can calculate all value except 1