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#include<stdio.h>
#include<math.h>
int main() {
	double x, y, r ,A ,B, C;
	double sum,gen;
	while(scanf("%lf %lf %lf %lf %lf %lf",&x,&y,&r,&A,&B,&C)!=EOF) {
		sum=A*x+B*y+C;
		gen=sqrt(A*A+B*B);
		if(sum<0)
			sum=-sum;
		if((sum/gen)<r)
			printf("2\n");
		else if((sum/gen)>r)
			printf("0\n");
		else
			printf("1\n");
	}
	return 0;
}