A famed example may be the Touring Salesman problem: supplied a list of towns, and also the times to acquire from any town to every other, as well as a time Restrict, a possible Option would be a list of metropolitan areas from the order the salesman visits them, https://financefeeds.com/3-best-cryptos-for-significant-returns-are-here-and-making-waves-in-the-cryptoverse/