题解 | #删除字符串中出现次数最少的字符#
删除字符串中出现次数最少的字符
http://www.nowcoder.com/practice/05182d328eb848dda7fdd5e029a56da9
str = input()
dic = {}
res = ''
# set() 是为了减少循环次数
for s in set(str):
cnt = str.count(s)
dic[s] = cnt
for d in str :
idx = min(dic.values())
if dic[d] != idx :
res += d
print (res)
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