题解 | #删除字符串中出现次数最少的字符#

import sys

for line in sys.stdin:
    s=line.strip()
    sli=list(s)
    sdic=dict()
    for i in sli:
        if i in sdic.keys():
            sdic[i]+=1
        else:
            sdic[i]=1
    vcount=list(sdic.values())
    vcount.sort()
    vmin=vcount[0]
    rvalue=[]
    for key,val in sdic.items():
        if val==vmin:
            rvalue.append(key)
    for i in rvalue:
        while True:
            if i in sli:
                sli.remove(i)
            else:
                break
    print(''.join(sli))