from math import factorialfrom collections import counterdef count_distinct_permutations(s):n = len(s)char_counts = Counter(s)total = factorial(n)for count in char_counts.values:total //= factorial(count)return total# 读取输入s = input.strip# 计算并输出结果print(count_distinct_permutations(s))摘要：from math import factorialfrom collections import counterdef count_distinct_permutations(s):n = len(s)char_counts = Counter(s)tota
来源：三省生
