题解

#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    double a,b;
    cin>>a>>b;
    double BIM=b/(a*a);
    printf("%.2f ",BIM);
    if(BIM<18.5){
        cout<<"thin";
    }else if(BIM<=23.9){
        cout<<"normal";
    }else{
        cout<<"obese";
    }
    return 0;
}