PAT1083 List Grades

#include <iostream>
#include<stdio.h>
#include<string>
#include <vector>
#include <algorithm>
using namespace std;
struct Stu{
    char name[15];
    char id[15];
    int grade;
    bool operator <(const  Stu & b) const
    {
        return grade<b.grade;
    }//从小到大排序
};
vector<struct Stu> stu;
int main()
{
    int N,grade1,grade2;
    Stu temp;
   //freopen("/Users/pantingting/Documents/code/data/input", "r", stdin);
    scanf("%d",&N);
    for (int i=0; i<N; i++) {
        scanf("%s%s%d",temp.name,temp.id,&temp.grade);
        stu.push_back(temp);
    }
    scanf("%d%d",&grade1,&grade2);
    sort(stu.begin(), stu.end());
    int count=0;
    for (int i=stu.size()-1; i>=0; i--) {
        if (stu[i].grade<=grade2&&stu[i].grade>=grade1) {
            printf("%s %s\n",stu[i].name,stu[i].id);
            count++;
        }
    }
    if (count==0) {
        printf("NONE\n");
    }
    return 0;
}