Triangle types

#include<stdio.h>
int main()
{
    double a,b,c,m,min,mid,max;
    long double x,y,z;
    scanf("%lf %lf %lf",&a,&b,&c);
    if(a>=b)
        if(a>=c)
        {
            max=a;
            if(b>=c)
            {
                min=c;
                mid=b;
            }
            else
            {
                min=b;
                mid=c;
            }
        }
        else
        {
            max=c;
            mid=a;
            min=b;
        }
    else if(b>=c)
    {
        max=b;
        if(a>=c)
        {
            min=c;
            mid=a;
        }
        else
        {
            min=a;
            mid=c;
        }
    }
    else
    {
        max=c;
        mid=b;
        min=a;
    }
    x=max*max;
    y=mid*mid;
    z=min*min;
    m=mid+min;

    if(max>=m)
        printf("NAO FORMA TRIANGULO\n");
    else
    {
        if(x==(y+z))
            printf("TRIANGULO RETANGULO\n");
        if(x>(y+z))
            printf("TRIANGULO OBTUSANGULO\n");
        if(x<(y+z))
            printf("TRIANGULO ACUTANGULO\n");
        if(max==mid && mid==min)
            printf("TRIANGULO EQUILATERO\n");
        else if(max==mid || max==min || mid==min)
            printf("TRIANGULO ISOSCELES\n");
    }

    return 0;
}