#include <math.h>
#include <stdio.h>

int main(int argc, char** argv)
{
	if (argc != 7) {
		printf("Usage:\n\t%s T1 T2 T3 R1 R2 R3\n", argv[0]);
		return 1;
	}

	double t1, t2, t3, r1, r2, r3;
	sscanf(argv[1], "%lf", &t1);
	sscanf(argv[2], "%lf", &t2);
	sscanf(argv[3], "%lf", &t3);
	sscanf(argv[4], "%lf", &r1);
	sscanf(argv[5], "%lf", &r2);
	sscanf(argv[6], "%lf", &r3);

	t1 = 1 / t1;
	t2 = 1 / t2;
	t3 = 1 / t3;

	r1 = log(r1);
	r2 = log(r2);
	r3 = log(r3);

	double g3 = (t3 - t1) / (r3 - r1), g2 = (t2 - t1) / (r2 - r1);

	double c = (g3 - g2) / (r3 - r2) / (r1 + r2 + r3);
	double b = g2 - c * (r2 * r2 + r2 * r1 + r1 * r1);
	double a = t1 - b * r1 - c * r1 * r1 * r1;

	printf("A = %.20lf\nB = %.20lf\nC = %.20lf\n", a, b, c);

	double r4;
	while (1) {
		printf("Resistance: ");
		scanf("%lf", &r4);
		if (!(r4 > 0))
			break;
		r4 = log(r4);
		printf("Temperature: %.2lf\n", 1 / (a + b * r4 + c * r4 * r4 * r4 ));
	}

	printf("Exit.\n");
	return 0;
}