Tasks should be stored in separate folder at path:
tasks/*
We recommend, to store solutions (name solutions with your nickname,
if this is not a main solution add suffix like -ok, -wa, -tl, -group1)
in path solutions/, generators in path generators/, statements in path
statements/, tests in path tests/{test_group}/ (samples group is
samples, pretest group is pretests), and other files like checkers and
validators in path files/.