31 lines
651 B
C++
31 lines
651 B
C++
#include<stdio.h>
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#include<math.h>
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int main()
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{
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double x1,x2,x3,y1,y2,y3,a,b,c,r;
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int T;
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scanf("%d",&T);
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while(T--)
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{
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scanf("%lf%lf",&x1,&y1);
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r=sqrt(x1*x1+y1*y1);
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a=1;
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b=y1;
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c=r*r/4-x1*x1;
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y2=(-b-sqrt(b*b-4*a*c))/(2*a);
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y3=(-b+sqrt(b*b-4*a*c))/(2*a);
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if(fabs(x1-0)<1e-7)
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{
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x2=-sqrt(r*r-y2*y2);
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x3=sqrt(r*r-y3*y3);
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}
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else
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{
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x2=(-r*r/2-y1*y2)/x1;
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x3=(-r*r/2-y1*y3)/x1;
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}
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printf("%.3lf %.3lf %.3lf %.3lf\n",x2,y2,x3,y3);
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}
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return 0;
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}
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