#include
    
     #include
     
      #include
      
       using namespace std;struct Point{	double x,r,x1,x2;	int visit;}p[10000];bool cmp(struct Point a,struct Point b){	return a.x1
       
        
         >n;	for(int i=0;i
         
          >m>>len>>wid; double x,r; for(int j=0;j
          
           >x>>r; p[j].x=x; p[j].r=r; if(r<=wid/2) {p[j].visit=0;continue;} else { double d=sqrt(r*r-wid*wid/4); p[j].x1=x-d; p[j].x2=x+d; p[j].visit=1; } } sort(p,p+m,cmp); int a=0,b=0; int k=0; for(int j=0;j
           
            =len) break; } } } if(a<=0&&b>=len) cout<
            
             <