简单

#include <iostream>
using namespace std;
int main(){
int n;
cin>>n;
double a=0,b=0;
a=n/2.0;
if(n>100){
b=30+(n-100)0.6;
}
else{
b=n0.3;
}
if(a>b){
cout<<"B"<<endl;
printf("%.1f",b);
}
else{
cout<<"A"<<endl;
printf("%.1f",a);
}
return 0;
}