题解 | #字符统计#
字符统计
http://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
s = input()
s = list(s)
dic = {}
for i in s:
if not i in dic:
dic[i] = 1
else:
dic[i] = dic[i] + 1
lst = list(dic.items())
dic = dict(sorted(lst,key=lambda x:(-x[1],x[0])))
res = list(dic.keys())
print(''.join(res))
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