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PAT乙级:1077 互评成绩计算

2020-04-09 23:43:18
阅读：8865 • 评论：168
标签：PAT乙级, 算法题

在浙大的计算机专业课中，经常有互评分组报告这个环节。一个组上台介绍自己的工作，其他组在台下为其表现评分。最后这个组的互评成绩是这样计算的：所有其他组的评分中，去掉一个最高分和一个最低分，剩下的分数取平均分记为 G1；老师给这个组的评分记为 G2。该组得分为 (G1+G2)/2，最后结果四舍五入后保留整数分。本题就要求你写个程序帮助老师计算每个组的互评成绩。

输入格式：

输入第一行给出两个正整数 N（> 3）和 M，分别是分组数和满分，均不超过 100。随后 N 行，每行给出该组得到的 N 个分数（均保证为整型范围内的整数），其中第 1 个是老师给出的评分，后面 N−1 个是其他组给的评分。合法的输入应该是 [0,M] 区间内的整数，若不在合法区间内，则该分数须被忽略。题目保证老师的评分都是合法的，并且每个组至少会有 3 个来自同学的合法评分。

输出格式：

为每个组输出其最终得分。每个得分占一行。

输入样例：

6 50
42 49 49 35 38 41
36 51 50 28 -1 30
40 36 41 33 47 49
30 250 -25 27 45 31
48 0 0 50 50 1234
43 41 36 29 42 29

输出样例：

编程语言：Python

解题思想：

1.只保留合法分数

2.去除一个最高分、最低分

3.四舍五入判断

时间复杂度：O(N^2)

代码如下：

NOG, FullPoint = map(int, input().split())  # 输入组数、满分
Score = list()  # 记录一行输入的分数
 
for i in range(NOG):
    Score = list(map(int, input().split()))  # 输入一行的分数
    G1 = Score[0]
    Score.pop(0)  # 将老师所给的分数删除，只留下其他组所给的分数
    GroupScore = list()  # 存放其他组所给的合法的分数
 
    for j in range(len(Score)):
        if 0 <= Score[j] <= FullPoint:  # 该分数合法
            GroupScore.append(Score[j])
 
    GroupScore.remove(max(GroupScore))  # 去除一个最高分
    GroupScore.remove(min(GroupScore))  # 去除一个最低分
 
    G2 = sum(GroupScore) / len(GroupScore)
 
    if (G1 + G2) / 2 - int((G1 + G2) / 2) >= 0.5:  # 入
        print(int((G1 + G2) / 2) + 1)
    else:  # 舍
        print(int((G1 + G2) / 2))

< >

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