Text in the problem have some format errors

[mr_x]

paid $x$, where $1 \le x \le 100,000$.
$1 \le k \le 5$

SPOJ.com - Problem NOCHANGE

In the vjudge it is fine

FFF - Virtual Judge

[simes]

I know, but I don’t think anybody that can fix it cares enough to correct this and other problems.

[mr_x]

ok