CF468C Hack it!
Description
Little X has met the following problem recently.
Let's define $ f(x) $ as the sum of digits in decimal representation of number $ x $ (for example, $ f(1234)=1+2+3+4 $ ). You are to calculate 
Of course Little X has solved this problem quickly, has locked it, and then has tried to hack others. He has seen the following C++ code:
`
ans = solve(l, r) % a;
if (ans
ans = solve(l, r) % a;
if (ans
Input Format
N/A
Output Format
N/A