题解 | #字符统计#
字符统计
https://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
s = input()
# 将输入的字符串转换成字典
sd = {}
for i in s:
sd[i] = sd.get(i,0) +1
# print(sd) # {'a': 2, 'd': 3, 'c': 3}
# 根据value值对字典排序，如果value值相同，则根据keys升序排序
# item[1]降序，item[0]升序
sd_new = dict(sorted(sd.items(),key=lambda item:(-item[1],item[0])))
for key in sd_new.keys():
print(key,end='')
