#include<stdio.h>
#include<math.h>
#include<iostream>
 
using namespace std;
 
int main() {
 
	int n,i,j=0;
	double Vx,Vy,g,x[1024],y[1024],X,Y,a,b,c,t;
 
	cin >> g;
	cin >> Vx;
	cin >> Vy;
 
	cin >> n;
 
	for(i=0;i<n;i++) {
	cin >> x[i];
	cin >> y[i];	
	}
 
	for(i=0;i<n-1;i++) {
 
	a=g/(2*Vx*Vx);
	b=(y[i+1]-y[i])/(x[i+1]-x[i])-Vy/Vx;
	c=y[i]-(y[i+1]-y[i])/(x[i+1]-x[i])*x[i];
 
	X=(-b+sqrt(b*b-4*a*c))/(2*a);
	Y=(y[i+1]-y[i])/(x[i+1]-x[i])*(X-x[i])+y[i];
	t=X/Vx;
 
	if((((X>=x[i])&&(X<x[i+1]))||((X<=x[i])&&(X>x[i+1])))&&(((Y>=y[i])&&(Y<y[i+1]))||((Y<=y[i])&&(Y>y[i+1])))) {
	cout <<"1";
	cout << X << " " << Y << " " << t << " " << i <<endl;
	j=1;
	i=n;
	}
	}
 
	if(j=0) cout << "0" <<endl;
 
	return 0;
}

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

MQoxCjEKMgowCjAKMTAwMAow

1
1
1
2
0
0
1000
0