题解 | #字符统计#
字符统计
https://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
a=input()
dic={}
ls=[]
for i in range(len(a)):
if a[i] not in dic:
dic[a[i]] = 1
else:
dic[a[i]]+=1
a=sorted(dic.items(),key=lambda ele:(-ele[1],ele[0]))
for i in range(len(a)):
ls.append(a[i][0])
print("".join(ls))
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