HJ102 字符统计
字符统计
http://www.nowcoder.com/questionTerminal/c1f9561de1e240099bdb904765da9ad0
简介易懂的Python解法
import collections
while True:
try:
s = input().strip()
c = collections.Counter(s)
sorted_items = sorted(c.items(), key=lambda x: (-x[1], x[0]))
print(''.join([item[0] for item in sorted_items]))
except:
break 
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