100元买100只鸡，其中公鸡5元1只，母鸡3元1只，小鸡1元3只，要求每种鸡至少有1只，要求编写程序统计并输出所有购买方案。-100 yuan to buy 100 chickens, of which 5 yuan a rooster, a hen 3 yuan, 1 yuan three chickens, requiring at least one for every breeder, statistics and programming required to purchase th