#include<stdio.h>
#include<string.h>
struct Stu{
char name[12];
char sex[2];
char id[12];
int grade;
}stu,higF,lowM;
int main(){
int i,j,n;
higF.grade=-1;lowM.grade=101;
scanf("%d",&n);
for(i=0;i<n;i++){
scanf("%s %s %s %d",stu.name,stu.sex,stu.id,&stu.grade);
if(strcmp(stu.sex,"F")==0&&stu.grade>higF.grade) higF=stu;
if(strcmp(stu.sex,"M")==0&&stu.grade<lowM.grade) lowM=stu;
}
if(higF.grade==-1)......
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