Uri 1015 - Distance between two points

#include
#include

int main()
{
    double x1,x2,y1,y2,root;

    scanf("%lf %lf %lf %lf",&x1,&y1,&x2,&y2);
    root= sqrt(((x2-x1)*(x2-x1))+((y2-y1)*(y2-y1)));

    printf("%.4f\n",root);

    return 0;
}