PAT A1036 Boys vs Girls(25)[男孩和女孩，字符串]

最新推荐文章于 2022-11-08 20:55:16 发布

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本文介绍了一种算法，用于分析学生数据库中男性和女性学生的最高和最低成绩，并计算两者之间的差距。通过读取输入文件，该算法能识别出成绩极端的学生信息，并在缺少特定性别的学生时提供缺席提示。

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 grade
F
−grade
M
. 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

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

Sample Output 1

Mary EE990830
Joe Math990112
6

Sample Input 2

1
Jean M AA980920 60

Sample Output 2

Absent
Jean AA980920
NA

思路1

逐个处理输入，记录下女生分数最高和男生分数最低的
按要求输出即可

代码1

#include <iostream>
#include <string>
using namespace std;

string girl_first, boy_last;
int MAX = -1, MIN = 101, n;

int main()
{
    cin >> n;
    while (n--)
    {
        string name, sex, id;
        int grade;
        cin >> name >> sex >> id >> grade;
        if (sex == "F" && grade > MAX)
        {
            girl_first = name + " " + id;
            MAX = grade;
        }
        if (sex == "M" && grade < MIN)
        {
            boy_last = name + " " + id;
            MIN = grade;
        }
    }
    bool absent = false;
    if (girl_first.size() == 0)
    {
        cout << "Absent" << endl;
        absent = true;
    }
    else
        cout << girl_first << endl;
    if (boy_last.size() == 0)
    {
        cout << "Absent" << endl;
        absent = true;
    }
    else
        cout << boy_last << endl;
    if (absent)
        cout << "NA" << endl;
    else
        cout << MAX - MIN << endl;

    return 0;
}