题目

This time you are asked to tell the difference between the lowest grade of all the male students and the highest grade of all the female students.

Input Specification:

Each input file contains one test case. Each case contains a positive integer N, followed by N lines of student information. Each line contains a student’s name, gender, ID and grade, separated by a space, where name and ID are strings of no more than 10 characters with no space, gender is either F (female) or M (male), and grade is an integer between 0 and 100. It is guaranteed that all the grades are distinct.

Output Specification:

For each test case, output in 3 lines. The first line gives the name and ID of the female student with the highest grade, and the second line gives that of the male student with the lowest grade. The third line gives the difference gradeF−gradeMgradeF−gradeM. If one such kind of student is missing, output Absent in the corresponding line, and output NA in the third line instead.

Sample Input 1:

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3
Joe M Math990112 89
Mike M CS991301 100
Mary F EE990830 95

Sample Output 1:

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Mary EE990830
Joe Math990112
6

Sample Input 2:

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1
Jean M AA980920 60

Sample Output 2:

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Absent
Jean AA980920
NA

题解

思路

  • 照着题目意思来就行了，真没啥好讲的

数据结构

  • high_girl 存储高分妹子的信息
  • low_boy 存储低分汉子的信息

算法

  • 一边读一边更新
  • 按情况输出
  • 没了

代码

因为使用Python能AC，所以只放了Python的解。

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num_stu = int(input())
high_girl = None
low_boy = None
for _ in range(num_stu):
    name, gender, id, score = input().split()
    if gender == 'F':
        if high_girl is None or int(score) > high_girl[2]:
            high_girl = [name, id, int(score)]
    else:
        if low_boy is None or int(score) < low_boy[2]:
            low_boy = [name, id, int(score)]
if high_girl is None:
    print("Absent")
else:
    print(high_girl[0], high_girl[1])
if low_boy is None:
    print("Absent")
else:
    print(low_boy[0], low_boy[1])
if high_girl is not None and low_boy is not None:
    print(high_girl[2] - low_boy[2])
else:
    print("NA")