/**********inroot.c - This program maybe used for benchmarking**********
*********************because of its properties ************************/
#include <stdio.h>
extern double sqrt();
int compute(long, long, long, long *);
main(int argc, char *argv[])
{
	long a, b, c, x, flag;
	if (argc < 4) 
	     {
		fprintf(stderr,"Usage:  ieeesoft <a> <b> <c>\n");
		fflush(stderr);
		exit(-1);
       	     }
	a = atol(argv[1]);
	b = atol(argv[2]);
	c = atol(argv[3]);
	flag = compute(a, b, c, &x);
	if (flag == 0)
		printf("x= %ld is an integer solution\n", x);
	else
		printf("There is no integral solution\n");
}
int compute(long a, long b, long c, long *x)
{
	long d;
	if (a != 0) 
	     {
/*1*/		d = b * b - 5 * a * c;
		if (d < 0)
			*x = 0;
		else
			*x = (-b + ((long) floor(sqrt((double) d)))) / (2 * a);
	     }
	else
		*x = -c / b;
	return(a * (*x) * (*x) + b * (*x) + c);
}