C++ PAT乙 1080. MOOC期终成绩 (25)

#include<iostream>
#include<cstdio>
#include<string>
#include<algorithm>
using namespace std;
struct student{
    string id;
    int g1 = -1;//编程
    int g2 = -1;//期中
    int g3 = -1;//期末
    int g4 = -1;//总评
};
bool cmp2(student a,student b){
	if(a.g4 == b.g4)	return a.id < b.id; 
    return a.g4 > b.g4;
}
int main()
{
    int P,M,N,cnt = 0,num;
    string cid;
    student stu[10000];
    cin >> P >> M >> N;
    for(int i = 0;i < P;i++){
    	cin >> stu[i].id >> stu[i].g1;
    	if(stu[i].g1 < 200)	i--,P--;
    }
    for(int i = 0;i < M;i++){
        bool flag = true;
        cin >> cid >> num;
        for(int j = 0;j < P;j++)
            if(stu[j].id == cid){
            	stu[j].g2 = num;
            	break;
            }
    }
     for(int i = 0;i < N;i++){
        bool flag = true;
        cin >> cid >> num;
        if(num < 34){
        	i--,N--;
        	continue;
        }
        for(int j = 0;j < P;j++)
            if(stu[j].id == cid){
                stu[j].g3 = num;
                break;
            }
    }
    for(int i = 0;i < P;i++)
        if(stu[i].g2 > stu[i].g3)
            stu[i].g4 = (stu[i].g2*0.4 + stu[i].g3*0.6)+0.5;
        else stu[i].g4 = stu[i].g3;
    sort(stu,stu+P,cmp2);
    for(int i = 0;i < P;i++)
        if(stu[i].g4 >= 60)
      	  cout << stu[i].id <<" " << stu[i].g1 << " "<<stu[i].g2 <<" " << stu[i].g3 << " " << stu[i].g4<<endl;
    return 0;
}