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题解 | 异常值与缺失值(不使用numpy)

import sys def main(): data = sys.stdin.read().strip().split() if not data: return it = iter(data) n = int(next(it)) i =...

2025-09-18

0 16

题解 | 特征扩展实现

import ast import math def mean(x): m = len(x[0]) total = [0. for _ in range(m)] for i in range(m): cnt = 0. for num in ...

2025-09-18

0 11