穷举算法

问题：小鸡5毛钱一只，母鸡3块钱一只，公鸡5块钱一只，问300块钱买100只鸡，有几种买法？ $xPrice = 0.5; $yPrice = 3; $zPrice = 5; $price = 300; $count = 100; $zCount = $price / $zPrice; $yCount = $price / $yPrice; $zCount = $price

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