#include <stdio.h>

int main()
{
	int Side_1, Side_2, Side_3;

	printf("Please enter the length of the first side of the triangle: ");
	scanf("%d%*c", &Side_1);

	printf("Please enter the length of the second side of the triangle: ");
	scanf("%d%*c", &Side_2);

	printf("Please enter the length of the third side of the triangle: ");
	scanf("%d%*c", &Side_3);
		
		if ((Side_1 <= 0) ||(Side_2 <= 0) || (Side_3 <= 0))
			printf("You can not have a negative value for any of the sides. Your triangle is invalid.");
 			
		else 
			if ((Side_1 == Side_2) && (Side_1 == Side_3) && (Side_2 == Side_3))
				printf("You have entered valid dimensions for an equilateral triangle.");
		
			else
				if ((Side_1 == Side_2) && (Side_1 != Side_3) && (Side_2 != Side_3))
					printf("You have entered valid dimensions for an isoceles triangle.");
			
				else 
					if ((Side_2 == Side_3) && (Side_1 != Side_3) && (Side_2 != Side_1))
						printf("You have entered valid dimensions for an isoceles triangle.");
						
					else
						if ((Side_1 == Side_3) && (Side_1 != Side_2) && (Side_2 != Side_3))
							printf("You have entered valid dimensions for an isoceles triangle.");
				
						else
							if ((Side_1 != Side_2) && (Side_1 != Side_3) && (Side_2 != Side_3) && (Side_1 + Side_2 > Side_3) || (Side_1 + Side_3 > Side_2) OR (Side_2 + Side_3 > Side_1))
							printf("You have entered valid dimensions for a scalene triangle.");
return(0);
}