#include <stdio.h>
inr main(){
    float bmi;
    scanf("%f",&bmi);
    if(bmi < 18.5){
        print("Underweight\n");
    }else if(bmi >= 18.5 && bmi <=24.9){
        printf("Normal weigh\n");
    }else if (bmi >= 25){
        printf(Overweight\n);
    }
    return 0;
}