Given the daily `prices` of a stock, you may buy and sell as many times as you like — but you can never hold more than one share at a time, so you must sell (or already be holding nothing) before buying again. Maximize the total profit across every trade you make. The single-transaction version of this problem tracks one running minimum and one running best-so-far. This version removes the "only once" restriction, which changes the shape of the answer entirely: with unlimited trades and no cost per trade, the best possible total is simply the sum of every day-to-day price increase in the whole sequence. Any stretch where the price climbs for several days in a row contributes the same total either way — bought once at the bottom and sold once at the top, or split into several smaller back-to-back trades along the way — so there's no benefit to ever holding through a day where the price is about to drop.