36 lines
719 B
C++
36 lines
719 B
C++
#include<stdio.h>
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#include<math.h>
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double l,v1,v2,v;
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int n;
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double f(double t1,double t2)
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{
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if(t2-t1<=1e-6)
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return t1;
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double time=(t1+t2)/2;
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if(floor((time*v/l+1)/2.0)+floor((time*(v1+v2)/l+1)/2.0)>=n)
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return f(t1,time);
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else
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return f(time,t2);
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}
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int main()
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{
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int t;
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double time,x,dist;
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scanf("%d",&t);
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while(t--)
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{
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scanf("%lf%lf%lf%d",&l,&v1,&v2,&n);
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if(v1>v2)
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v=v1-v2;
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else
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v=v2-v1;
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time=f(0,100000);
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x=time*v1;
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while(x>0)
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x=x-l;
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dist=(-x)<l+x?(-x):l+x;
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printf("Time=%.3lf Dist=%.3lf\n",time,dist);
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}
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return 0;
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}
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