#include <stdio.h>	

int main(void){	

	double Height, Weight, BMI;		

	printf("Input your Height[cm]:");
	scanf("%lf",&Height);
	
	printf("Input your Weight[kg]:");
	scanf("%lf",&Weight);

	BMI = (10000.0)*Weight/(Height*Height);

	/*
	printf("Your BMI is %.1f. Underweight.\n", BMI);
	printf("Your BMI is %.1f. Normal.\n", BMI);
	printf("Your BMI is %.1f. Pre-obese.\n", BMI);
	printf("Your BMI is %.1f. Obese class.\n", BMI);
	*/

	/*Example 1*/
	if(BMI < 18.5               ) printf("Your BMI is %.1f. Underweight.\n", BMI);
	if(BMI >= 18.5 && BMI < 25.0) printf("Your BMI is %.1f. Normal.\n", BMI);
	if(BMI >= 25.0 && BMI < 30.0) printf("Your BMI is %.1f. Pre-obese.\n", BMI);
	if(BMI >= 30.0              ) printf("Your BMI is %.1f. Obese class.\n", BMI);
	
	/*Example 2*/
	if(BMI < 18.5) 
		printf("Your BMI is %.1f. Underweight.\n", BMI);
	else if(BMI < 25.0) 
		printf("Your BMI is %.1f. Normal.\n", BMI);
	else if(BMI < 30.0) 
		printf("Your BMI is %.1f. Pre-obese.\n", BMI);
	else 
		printf("Your BMI is %.1f. Obese class.\n", BMI);
	
	/*Example 3*/
	if(BMI < 25.0){ 
		if(BMI < 18.5)	
			printf("Your BMI is %.1f. Underweight.\n", BMI);
		else
			printf("Your BMI is %.1f. Normal.\n", BMI);
	}else{ 
		if(BMI < 30.0)
			printf("Your BMI is %.1f. Pre-obese.\n", BMI);
		else 
			printf("Your BMI is %.1f. Obese class.\n", BMI);
	}

	return 0;

}