Write costliest(products) where products are [name, price]; return the name of the most expensive (first one on ties).
costliest([['pen', 10], ['bag', 900], ['book', 250]]) → 'bag'
costliest([['a', 1]]) → 'a'
Submit runs 3 tests, including hidden edge cases.
Each hint gives a little more help. Try on your own first.
Run your code to see the output here.