#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;
}