Today, the author is not feeling quite well, so this problem will not have a long intro, with kings, rice fields, little Billies and Johnies, or some Elven related things. A file will be provided that describes one number. In first row of file, a number $$N$$ is given. The second row contains $$N$$ digits, which are not separated. Those digits represent a number $$L$$.

Let's imagine a function $$R(x, y)$$. The function gives the remainder of $$x$$ when dividing with $$y$$, simple as that.

Now, if number $$A = R(L, 9)$$, number $$B = R(L, 77)$$ and number $$C = R(L, 41)$$, calculate the following value: $$3 \times A - 7 \times B + 10 \times C$$.

The number $$L$$ is described in file which can be downloaded from here: LINK

×