#include<stdio.h>#include<string.h>#include<math.h>#define M 8const double eps=1e-8;const double inf=10e12;const double Pi=acos(-1);typedef struct talPoint{double x,y;talPoint(){}talPoint(double x,double y){this->x=x;this->y=y;}}Point;typedef struct{Point p;double v;double dir;}Guest;Guest g[M],f[M];Guest o;bool mark[M];double anst;int stk[M],top;int n;double Max(double a,double b){return a>b?a:b;}double Dis(Point p,Point q){p.x-=q.x,p.y-=q.y;return sqrt(p.x*p.x+p.y*p.y);}double Dis(Point p){return sqrt(p.x*p.x+p.y*p.y);}void CallWork(){int i;Point next;double tmpt,curt;double t1,t2;double a,b,c,cosa,d;Point e,h;tmpt=0;curt=0;o.p.x=o.p.y=0.0;memmove(g,f,sizeof(f));for(i=0;i<top;i++){g[stk[i]].p.x+=curt*g[stk[i]].v*cos(g[stk[i]].dir);g[stk[i]].p.y+=curt*g[stk[i]].v*sin(g[stk[i]].dir);h.x=g[stk[i]].v*cos(g[stk[i]].dir);h.y=g[stk[i]].v*sin(g[stk[i]].dir);e.x=g[stk[i]].p.x-o.p.x;e.y=g[stk[i]].p.y-o.p.y;cosa=(e.x*h.x+e.y*h.y)/(g[stk[i]].v*Dis(e));d=Dis(e);a=(o.v*o.v-g[stk[i]].v*g[stk[i]].v);b=2*g[stk[i]].v*d*cosa;c=d*d;t1=(b+sqrt(b*b+4*a*c))/(2*a);next.x=g[stk[i]].v*t1*cos(g[stk[i]].dir)+g[stk[i]].p.x;next.y=g[stk[i]].v*t1*sin(g[stk[i]].dir)+g[stk[i]].p.y;t2=Dis(next)/g[stk[i]].v;curt+=t1;o.p=next;if(curt+t2>anst) return;tmpt=Max(curt+t2,tmpt);}if(tmpt<anst) anst=tmpt;}void Dfs(){int i;if(top==n){CallWork();return;}for(i=0;i<n;i++){if(mark[i]) continue;mark[i]=true;stk[top++]=i;Dfs();top--;mark[i]=false;}}int main(){int i;while(scanf("%d",&n),n){scanf("%lf",&o.v);for(i=0;i<n;i++){scanf("%lf%lf%lf%lf",&f[i].p.x,&f[i].p.y,&f[i].v,&f[i].dir);}anst=inf;top=0;Dfs();printf("%.0fn",anst);}return 0;}
