Warm up by covering a few fundamental aspects of calculations with array's.

Test yourself on this widely asked interview question.

See if you can find the longest word (aka subsequence) in a sequence of letters.

Help Alice satisfy her sweet tooth in a safe manner

Test yourself with a few fundamental aspects of Tree recursion.

Calculate an average of an array that has some specific elements removed

Help Serena and friends choose what to have for dinner

Find a way to move the values in an array based on them being even or odd

Test yourself on this expanded question of Two Sums.

Test yourself on this expanded question of Three Sums.

A Google Interview question that asks to find the volume in lake(s)

Find a subsequence of increasing values; solutions might use dfs or dynamic programming

Find a place in an array to split so that they sum to the same value

What could be more interesting than watching a baseball game? A game with math!

Attempt your hand at this Google Interview question that asks to decompress a string.

Warm up by drawing a straight line in ggplot.