#include <stdio.h>
struct BMI
{
    float n;
};
int main()
struct BMI m;
{
    scanf("%f",&m.bmi);
    if(m.bmi<18.5)
    {
        printf("Underweight");
    }
    if else (m.bmi>18.5 && m.bmi<24.9) 
    {
        printf("Normal weight");
    }
    else
    {
        printf("Overweight");
    }
    return 0;
}