CF366C Dima and Salad

有 $n$ 个水果，每个水果有两个属性：美味值和卡路里值。现在选用若干个（至少 $1$ 个）水果制作一份特殊的沙拉，沙拉的美味值为所选的水果的美味值的和，沙拉的卡路里值为所选水果的卡路里值的和。沙拉的美味值恰好是卡路里值的 $K$ 倍。请计算该沙拉美味值最大为多少。

无

无

In the first test sample we can get the total taste of the fruits equal to 18 if we choose fruit number 1 and fruit number 2, then the total calories will equal 9. The condition  fulfills, that's exactly what Inna wants. In the second test sample we cannot choose the fruits so as to follow Inna's principle.