给定含有n个元素的多重集合S，每个元素在S中出现的次数称为该元素的重数。多重集S中重数最大的元素称为众数。

例如，S={1，2，2，2，3，5}。

多重集S的众数是2，其重数为3。

-Given n elements containing multiple sets S, each element appears in S as the number of multiplicity of the elements. Multi-set S of elements in the multiplicity of the largest known mode. For example, S = (1,2,2,2,3,5). Multi-set S of the mode is 2, its weight is 3.