题解 | #字符统计#
字符统计
http://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
import collections s = list(input()) s.sort() d = collections.OrderedDict() for i in s: if i in d: d[i] += 1 else: d[i] = 1 for k, _ in sorted(d.items(), key=lambda item: item[1], reverse=True): print(k, end='')
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