There are 10 integral gram weights (the weights are allowed to be the same), one or several of them are placed on the right side of the balance, and the item to be weighed is placed on the left side of the balance, which can weigh 1, 2, 3, ..., 200 All integer grams of items come from; then, what is the least number of grams of the second-heaviest weight among these 10 weights.
有10个整数克的砝码(允许砝码重量相同)，将其中一个或几个放在天平的右边，待称的物品放在天平的左边，能称出1，2，3，…，200的所有整数克的物品来；那么，这10个砝码中第二重的砝码最少是多少克．
<result>18</result>