题解 | #字符统计#
字符统计
https://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
from re import T
ss =input()
num =[]
la ={}
ss =sorted(ss,key=ord)
for i in ss:
la[i]=la.get(i,0)+1
s = list(set(ss))
la = sorted(la.items(),key=lambda x:x[1],reverse=True)
for i in la:
print(i[0],end='')
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