#include <stdio.h>
#include <math.h>
#define CRT_SECURE_NO_WARNINGS
void main()
{
	int num, a, b, c, choice;
	double d, Root, Root2, X1, X2;

	/*printf("1. 3 digits number organizing.\n");
	printf("2. Linear equation calculator.\n");
	printf("3. Exit.\n");
	scanf_s("%d", &choice);
	switch (choice)
	{
	case 1: printf("Insert a 3 digits number.\n");
			scanf_s("%d", &num);

			a = num / 100; //מאות
			b = num / 10 % 10;//עשרות
			c = num % 10;//יחידות

			printf("Reversed digits: %d%d%d\n", c, b, a);

			if (a > b)
			{
				if (a > c)
				{
					if (c > b)
						printf("Ascending digits: %d%d%d\n", b, c, a);
					else // a>b && b>c
						printf("Ascending digits: %d%d%d\n", c, b, a);
				}
				else // c>a && a>b
					printf("Ascending digits: %d%d%d\n", b, a, c);
			}
			else // b>a
			{
				if (c > b)
				{
					if (b > a)
						printf("Ascending digits: %d%d%d\n", a, b, c);
					else // c>b && a>b
						printf("Ascending digits: %d%d%d\n", b, a, c);
				}
				else //b>c && b>a
					if (a > c)
						printf("Ascending digits: %d%d%d\n", c, a, b);
					else // b>c && c>a
						printf("Ascending digits: %d%d%d\n", a, c, b);
			}
		break;

	case 2: printf("Insert the coefficients of a linear equation.\n");*/

			scanf_s("%d%d%d", &a, &b, &c);

			d = (double)(b*b) - (4 * a * c);
			Root =(double) sqrt(d);
			X1 = (double)((-b) + Root) / (2 * a);
			X2 = (double)((-b) - Root) / (2 * a);
			Root2 = (double)sqrt((-c / a));
			//(sqrt((b * b) - (4 * a*c))) / (2 * a);

			if ((d < 0) || (a == 0))
			{
				if ((b == 0) && (a == 0))
					printf("X has no solution.\n");
				else
				{
					if (a == 0)
						printf("X = %.1lf\n",(double)((-c) / b));
					else
						if (d == 0)
							printf("X= %.1lf\n", Root2);
						else // d<0
							printf("X has no solution.\n");
				}
			}
			else
				printf("X1= %.1lf X2= %.1lf\n", X1, X2);
		/*break;

	case 3:
		break;
	}*/
}