// editor2#include<stdio.h>
struct bmivalue{
    float bmi;
};
int main(){
    float value;
    struct bmivalue b1;
    scanf("%f",&b1.bmi);
    if(b1.bmi<18.5){
        printf("Underweight");
    }else if(b1.bmi>=18.5 && b1.bmi<=24.9){
        printf("Normal weight");
    }else if(b1.bmi>=25){
        printf("Overweight");
    }
    return 0;
}