desert crossings
you live in a desert oasis and grow miniature watermelons that are worth a gr8 deal of money,if u can get them to the market 15 kilometers away across the desert. ur harvest this year is 45 melons,but u have no way to get them to the market, except to carry them across the desert. u have a backback that holds up to 15 melons, the max number that u can carry at a time .to walk across the desert, u need a certain amount of fluidand nourishment which is supplied by the melonsu carry.for each kilometer u walk{in either direction}, one melon must be eaten.
ur challenge is to find a way to get as many melons as possible to market.