how 1 code be in answer, if it was already called.
doTest(4, [1, 2, 3, 3, 4, 5, 1], [5, 1, 3, 4]);

p.s i've read more carefully several times, all done. ty

i couldn't understand whant i need to do.

i understood. haD to read topic description in my native language))

i can't understand(

i thinл auther wanted us to notice pattern.

ok, you start with converting every member of an array into positive bollean until you find flicker. on flicker switch on negative.
next flicker switches value from negative bollean to positive and so on.

sorry but i don't understand what should be done

i like your soluttion, ofcourse it's just like mine, but it very readable and undestandable!

i think this more clever solution than top with spread operator.
with spread operator and reduce, we go through array twice.

as usually. it's difficult to make intresting task, so people trying to make more mysterious task, but as was mentioned in other Kata, trying to understand what people really want you to do, is part of the job) so from that perspective good kata) remember 7 red lines)

good explanation, good task.

difucult to understand for non English user) and i think formula should be provided. at least normal source.