刷题时遇到了奇怪的错误

#include<iostream>
#include<vector>
#include<algorithm>
#include<string.h>
using namespace std;

typedef struct report Report;
struct report
{
    char Number[9];
    int score1;
    int score2;
};

class Solution{
public:
    bool cmp(Report a,Report b)
    {
        if(a.score1+a.score2 > b.score1+b.score2) return true;
        else if(a.score1+a.score2 == b.score1+b.score2)
        {
            if(a.score1 > b.score1) return true;
            if(a.score1 == b.score1)
                return strcmp(a.Number,b.Number) < 0 ? true : false;
        }
        return false;
    }

    void scoreSort(){
        vector<vector<Report> > student;
        student.resize(4);

        int n,L,H;
        cin>>n>>L>>H;

        int count=0;
        for(int i=0;i<n;i++){
            Report stu;
            cin>>stu.Number>>stu.score1>>stu.score2;
            if(stu.score1<L || stu.score2<L) continue;
            count++;
            if(stu.score1>=H && stu.score2>=H) student[0].push_back(stu);
            else if(stu.score1>=H && stu.score2<H) student[1].push_back(stu);
            else if(stu.score1<H && stu.score1>=stu.score2) student[2].push_back(stu);
            else student[3].push_back(stu);
        }

        for(int i=0;i<4;i++){
            sort(student[i].begin(),student[i].end(),cmp);
        }
        for(int i=0;i<4;i++){
            vector<Report>::iterator it;
            for(it=student[i].begin();it != student[i].end();it++)
                cout<<it->Number<<" "<<it->score1<<" "<<it->score2<<endl;
        }
    }
};

int main(){
    Solution a;
    a.scoreSort();
    return 0;
}