题解 | 学生基本信息输入输出

from decimal import Decimal, ROUND_HALF_UP

n, score = input().split(";")
s = score.split(",")


def round_correct(num):
    return Decimal(str(num)).quantize(Decimal("0.01"), rounding=ROUND_HALF_UP)


print(
    f"The each subject score of No. {n} is {round_correct(s[0])}, {round_correct(s[1])}, {round_correct(s[2])}."
)

使用 decimal 模块中的 Decimal 类，可以更精确地控制四舍五入行为