I've got invited to google foobar yesterday with a banner in google developers site. I am not yet requesting any challenge. what should I know or study to start the challenge?

@Haxk20 Has whole challenge 48 hours to solve? if so How many questions should I solve in 48 hours? do you suggest any resources or sites that improve my ability to solve the questions?

@Haxk20 yes, math was really helpful in solving foobar. I’m also a self-taught coder, but my current real job is being a mathematician, and that was a tremendous advantage in the challenge. @shotgunner, The kind of math you’ll need is mostly discrete and combinatorial. Recommend leetcode for practice. Foobar level 1 ~= lc easy, 1 question
F 2 ~= lc medium, 2 questions
F 3 ~= lc medium, 3 q
F 4 ~= lc hard, 2 q
F 5 ~= lc hard, 1 q