31 lines
653 B
C++
31 lines
653 B
C++
#include<stdio.h>
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#include<math.h>
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#include<stdlib.h>
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#define PI acos(-1.0)
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#define G 9.87
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#define H1 3
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#define H2 0.5
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int main()
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{
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double v,m,a;
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while(~scanf("%lf%lf%lf",&v,&m,&a))
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{
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double vx=v*cos(a*PI/180);
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double vy=v*sin(a*PI/180);
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double x,t1,t2,t;
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if(vy*vy>G)
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{
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double t1=2*(vy-sqrt(vy*vy-2*H2*G))/G;
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double t2=(sqrt(vy*vy+2*G*H1)-vy)/G;
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t=t1+t2;
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}
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else
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{
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t=2*vy/G+(sqrt(vy*vy+2*G*H1)-vy)/G;
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}
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x=t*vx;
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printf("%.3lf\n",x);
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}
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return 0;
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}
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