PAT 1083. List Grades (25)

1083. List Grades (25)

Given a list of N student records with name, ID and grade. You are supposed to sort the records with respect to the grade in non-increasing order, and output those student records of which the grades are in a given interval.

Input Specification:

Each input file contains one test case. Each case is given in the following format:

N
name[1] ID[1] grade[1]
name[2] ID[2] grade[2]
... ...
name[N] ID[N] grade[N]
grade1 grade2

where name[i] and ID[i] are strings of no more than 10 characters with no space, grade[i] is an integer in [0, 100], grade1 and grade2 are the boundaries of the grade's interval. It is guaranteed that all the grades are distinct.

Output Specification:

For each test case you should output the student records of which the grades are in the given interval [grade1, grade2] and are in non-increasing order. Each student record occupies a line with the student's name and ID, separated by one space. If there is no student's grade in that interval, output "NONE" instead.

Sample Input 1:

4
Tom CS000001 59
Joe Math990112 89
Mike CS991301 100
Mary EE990830 95
60 100

Sample Output 1:

Mike CS991301
Mary EE990830
Joe Math990112

Sample Input 2:

2
Jean AA980920 60
Ann CS01 80
90 95

Sample Output 2:

NONE

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

using namespace std;

struct Student
{
    string name;
    string id;
    int grade;
};

bool cmp(const Student& s1, const Student& s2)
{
    return s1.grade > s2.grade;
}

vector<Student> students(101);

int main()
{
    int stuNum;
    cin >> stuNum;

    for (int i = 0; i < stuNum; i++)
        cin >> students[i].name >> students[i].id >> students[i].grade;
    sort(students.begin(), students.end(), cmp);
    int grade1, grade2;
    cin >> grade1 >> grade2;
    bool flag = false;
    for (int i = 0; i < students.size(); i++)
    {
        if (students[i].grade >= grade1&&students[i].grade <= grade2)
        {
            cout << students[i].name << " " << students[i].id << endl;
            flag = true;
        }
        if (students[i].grade < grade1)
            break;
    }
    if (!flag)
        cout << "NONE";

}