#include "stdio.h"
#include "math.h"

int main()
{
	int a, b, c, D;
	scanf("%d%d%d", &a, &b, &c);
	if(a==0)
	{
		if(b==0)
		{
			if (c==0)
				printf("x - all");
			else
				printf("no solution");
		}
		else
		{
			if(c==0)
				printf("x=0");
			else
				printf("%f", -(float)c/b);
		}
	}
	else
	{
		if(b==0)
		{
			if(c==0)
			printf("x=0");
			else
			{
			    if(-(double)c/a>0)
			        printf("%f", sqrt(-(double)c/a));
			    else
			        printf("no solution66");
			}

		}
		else
		{
	    	D=b*b-4*a*c;
	    	if(D<0)
	    	   printf("no solution");
	    	else
	    	{
	    	if(D=0)
	    	    printf("%f", -(float)b/2/a);
	    	else
	            printf("x1=%f, x2=%f", (float)(-b-sqrt(D))/2/a, (float)(-b+sqrt(D)/2/a));
	    	}
		}
	}
	return 0;
}