#include<stdio.h>
struct villager {
    float bmi;
    char categorizes[20];
}
  int main ()
{
    struct villager v;
    scanf("%f",&v.bmi);
    if(v.bmi<18.5)
    {
        printf(v.categorizes,"Underweight");
    }else if(v.bmi<=24.9)
    {
        printf(v.categorizes,"Normal weight");
    }
    else 
    {
        printf(v.categorizes,"Overweight");
    }
    printf("%s",v.categorizes);
}