-----------------------方法一:使用字典---------------------------
s='aabcdefaabbccdeffffffffffff'c={}for i in s:if i not in c.keys():c[i]=0if i in c.keys():c[i]=c[i]+1h=0for k in c.keys():if h<c[k]:h=c[k]o=kprint h,o
---------------------------------------------方法二:使用数组----------------------------------
A=[]s='aabcdcecfaaffffffffffffff'h=0for i in s:A.append(i)for i in range(len(A)):c[A[i]]=0for j in range(0,i+1):if A[j]==A[i]:c[A[i]]=c[A[i]]+1for k in c.keys():if h<c[k]:h=c[k]o=kprint h,o