[PAT-甲级]1036.Boys and Girls

1036. Boys vs Girls (25)

时间限制

400 ms

内存限制

65536 kB

代码长度限制

16000 B

判题程序

Standard

作者

CHEN, Yue

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:

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

Sample Output 1:

Mary EE990830Joe Math9901126

Sample Input 2:

1Jean M AA980920 60

Sample Output 2:

AbsentJean AA980920NA

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解题思路：结构数组排序，给定N个学生的信息，输出女生最高分与男生最低分的信息，并输出分值之间的差值。如果不存在男生或者女生则在对应出输出absent。同时差值为NA。对N个学生按照分数进行从大到小排序，然后去找对应的学生信息。

代码如下：

#include<iostream>#include<string>#include<vector>#include<algorithm>using namespace std;struct Student{string name;char s;string id;int grade;};bool cmp(const Student& s1, const Student& s2){return s1.grade > s2.grade;}vector<Student> students(110);int main(){  int stuNum;  cin>>stuNum;  for (int i = 0; i < stuNum; i++)      cin>>students[i].name>>students[i].s>>students[i].id>>students[i].grade;          sort(students.begin(), students.end(), cmp);      int male_grade, female_grade;   bool flag1 = true, flag2 = true;      for (int i = 0; i < students.size(); i++)  {      if (students[i].s == 'F')      {          cout<<students[i].name<<" "<<students[i].id<<endl;          flag1 = false;          female_grade = students[i].grade;          break;      }  }  if (flag1)      cout << "Absent"<<endl;          for (int i = students.size() - 1; i >= 0 ; i--)  {      if (students[i].s == 'M')      {          cout<<students[i].name<<" "<<students[i].id<<endl;          flag2 = false;          male_grade = students[i].grade;          break;      }  }  if (flag2)      cout << "Absent"<<endl;          if(!flag1 && !flag2)  cout<<female_grade-male_grade<<endl;  else  cout<<"NA"<<endl;  return 0;}