题解 | #字符统计#
字符统计
https://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
ent = input()
ent_list = [i for i in ent]
ent_sort = {}
for i in set(ent_list):
c = ent_list.count(i)
ent_sort.setdefault(c,[])
ent_sort[c].append(i)
dec = sorted(ent_sort.keys(), reverse=True)
out = []
for i in dec:
ent_sort[i].sort()
out += ent_sort[i]
for i in out:
print(i,end='')
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