PAT A1025 PAT Ranking

#include <stdio.h>
#include<iostream>
#include <string.h>
#include<stdlib.h>
#include<algorithm>
using namespace std;
//PAT A1025 PAT Ranking
struct student{
	char id[15];
	int score;
	int l_n;
	int l_r;
}stu[3000];
bool cmp(student a,student b){
	if(a.score!=b.score)return a.score>b.score;
	else return strcmp(a.id,b.id)<0;//按照准考证号从小到大进行排序 
}
int main(){
    int n,k,num=0;//考生总数 
    scanf("%d",&n);
	for(int i=0;i<n;i++){
		scanf("%d",&k);
		for(int j=0;j<k;i++){
		  scanf("%d%d",&stu[num].id,&stu[num].score);
		  stu[num].l_n=i;
		  num++;
		}
		sort(stu+num-k,stu+num,cmp);
		stu[num-k].l_r=1;
	    for(int j=num-k+1;j<num;j++)
	    {
		if(stu[j].score==stu[j-1].score){
			stu[j].l_r=stu[j-1].l_r;
			
		}else{
		 stu[j].l_r=j+1-num+k;
		  
	}
	} 
}
printf("%d",num);
sort(stu,stu+num,cmp);
int r=1;
for(int i=0;i<num;i++){
	if(i>0&&stu[i].score!=stu[i-1].score){
		r+=1;
	}
	printf("%s ",stu[i].id);
	printf("%d %d %d\n",r,stu[i].l_n,stu[i].l_r);
}

	return 0;
}

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