#include <bits/stdc++.h>
#define EPS 1e-10
#define PI 3.141592653589793238
#define equals(a,b) (fabs((a)-(b)) < EPS)
#define rep(i,n) for(int i=0;i<n;++i)
typedef long long ll;
using namespace std;

static const int COUNTER_CLOCKWISE = 1;
static const int CLOCKWISE = -1;
static const int ONLINE_BACK = 2;
static const int ONLINE_FRONT = -2;
static const int ON_SEGMENT = 0;

//Intercsect Circle & Circle
static const int ICC_SEPERATE = 4;
static const int ICC_CIRCUMSCRIBE = 3;
static const int ICC_INTERSECT = 2;
static const int ICC_INSCRIBE = 1;
static const int ICC_CONTAIN = 0;

// 点
struct Point {
    double x,y;
    Point(){}
    Point(double x, double y) : x(x),y(y){}
    Point operator+(Point p) {return Point(x+p.x, y+p.y);}
    Point operator-(Point p) {return Point(x-p.x, y-p.y);}
    Point operator*(double k){return Point(x*k,y*k);}
    Point operator/(double k){return Point(x/k,y/k);}
    double norm(){return x*x+y*y;}
    double abs(){sqrt(norm());}
    bool operator == (const Point &p) const {return equals(x,p.x)&&equals(y,p.y);}
    bool operator < (const Point &p) const {
        return x!=p.x?x<p.x:y<p.y;
        //grid-point only
        //return !equals(x,p.x)?x<p.x:!equals(y,p.y)?y<p.y:0;
    }
};

typedef Point P;
typedef vector<Point> Polygon;

double norm(P a){return a.x*a.x+a.y*a.y;}
double abs(P a){return sqrt(norm(a));}

// 線分
struct Segment {
    Point p1,p2;
    Segment(){}
    Segment(Point p1, Point p2):p1(p1),p2(p2){}
};

typedef Segment Line;

struct Circle {
    Point c;
    double r;
    Circle(){}
    Circle(Point c, double r):c(c),r(r){}
};

// 法線ベクトル
Point normal(Point p){return Point(-p.y,p.x);}

// 内積
double dot(Point a, Point b) {return a.x*b.x + a.y*b.y;}

// 外積
double cross(Point a, Point b) {return a.x*b.y-a.y*b.x;}
// 2直線の直行判定
bool is_orthogonal(Point a1, Point a2, Point b1, Point b2) {
    return equals(dot(a1-a2, b1-b2), 0.0);
}
// 2直線の平行判定
bool is_parallel(Point a1, Point a2, Point b1, Point b2) {
    return equals(cross(a1-a2, b1-b2), 0.0);
}
// 点cが直線ab上にあるかないか
bool is_point_on_INF_line(Point a, Point b, Point c) {
    return equals(cross(b-a,c-a), 0.0);
}
// 点cが線分ab上にあるかないか
bool is_point_on_LIMITED_line(Point a, Point b, Point c) {
    return (Point(a-c).abs()+Point(c-b).abs() < Point(a-b).abs() + EPS);
}
// 直線と点の距離
double distance_l_p(Point a, Point b, Point c) {return abs(cross(b-a, c-a)) / (b-a).abs();}

// 直線と点の距離
double getDistanceLP(Line l, Point p) {
    return abs(cross(l.p2-l.p1,p-l.p1)/abs(l.p2-l.p1));
}

// 線分と点の距離
double getDistanceSP(Segment s,Point p){
    if(dot(s.p2-s.p1,p-s.p1) < 0.0 ) return abs(p-s.p1);
    if(dot(s.p1-s.p2,p-s.p2) < 0.0 ) return abs(p-s.p2);
    return getDistanceLP(s,p);
}


// 点a,bを端点とする線分と点cとの距離
double distance_ls_p(Point a, Point b, Point c) {
    if (dot(b-a, c-a) < EPS) return (c-a).abs();
    if (dot(a-b, c-b) < EPS) return (c-b).abs();
    return abs(cross(b-a, c-a)) / (b-a).abs();
}

Point project(Segment s, Point p) {
    Point base = s.p2-s.p1;
    double r = dot(p-s.p1,base)/norm(base);
    return s.p1+base*r;
}

// 点が線分のどちら側にあるかを計算
int ccw(Point p0,Point p1,Point p2) {
    P a = p1-p0;
    P b = p2-p0;
    if(cross(a,b) > EPS) return COUNTER_CLOCKWISE;
    if(cross(a,b) < -EPS) return CLOCKWISE;
    if(dot(a,b) < -EPS) return ONLINE_BACK;
    if(a.norm()<b.norm()) return ONLINE_FRONT;
    return ON_SEGMENT;
}

// a1,a2を端点とする線分とb1,b2を端点とする線分の交差判定
bool intersectSS(Point p1, Point p2, Point p3, Point p4) {
    return (ccw(p1,p2,p3)*ccw(p1,p2,p4) <= 0&&ccw(p3,p4,p1)*ccw(p3,p4,p2) <= 0 );
}

// a1,a2を端点とする線分とb1,b2を端点とする線分の交差判定
bool intersectSS(Segment s1, Segment s2) {
    return intersectSS(s1.p1,s1.p2,s2.p1,s2.p2);
}

// 多角形と線分の交差判定
bool intersectPS(Polygon p,Segment l){
    int n=p.size();
    for(int i=0;i<n;i++)
    if(intersectSS(Segment(p[i],p[(i+1)%n]),l)) return 1;
    return 0;
}

// 円と円の交差判定
int intersectCC(Circle c1,Circle c2){
    if(c1.r<c2.r) swap(c1,c2);
    double d=abs(c1.c-c2.c);
    double r=c1.r+c2.r;
    if(equals(d,r)) return ICC_CIRCUMSCRIBE;
    if(d>r) return ICC_SEPERATE;
    if(equals(d+c2.r,c1.r)) return ICC_INSCRIBE;
    if(d+c2.r<c1.r) return ICC_CONTAIN;
    return ICC_INTERSECT;
}

// 線分と円の交差判定
bool intersectSC(Segment s,Circle c){
    return getDistanceSP(s,c.c)<=c.r;
}

// 
int intersectCS(Circle c,Segment s){
    if(norm(project(s,c.c)-c.c)-c.r*c.r>EPS) return 0;
    double d1=abs(c.c-s.p1),d2=abs(c.c-s.p2);
    if(d1<c.r+EPS&&d2<c.r+EPS) return 0;
    if((d1<c.r-EPS&&d2>c.r+EPS)||(d1>c.r+EPS&&d2<c.r-EPS)) return 1;
    Point h=project(s,c.c);
    if(dot(s.p1-h,s.p2-h)<0) return 2;
    return 0;
}




// 線分と線分の距離
double getDistanceSS(Segment s1,Segment s2){
    if(intersectSS(s1,s2)) return 0.0;
    return min(min(getDistanceSP(s1,s2.p1),getDistanceSP(s1,s2.p2)),
    min(getDistanceSP(s2,s1.p1),getDistanceSP(s2,s1.p2)));
}

// a1,a2を端点とする線分とb1,b2を端点とする線分の交点計算
// 前提として交差していることが必要
P getCrossPointSS(P a1, P a2, P b1, P b2) {
    P b = b2-b1;
    double d1 = abs(cross(b, a1-b1));
    double d2 = abs(cross(b, a2-b1));
    double t = d1/(d1+d2);
    return a1+(a2-a1)*t;
}

// a1,a2を通る直線とb1,b2を通る直線の交点計算
// 前提として平行でないことが必要
Point getCrossPointLL(Line l1,Line l2){
    double a=cross(l1.p2-l1.p1,l2.p2-l2.p1);
    double b=cross(l1.p2-l1.p1,l1.p2-l2.p1);
    if(abs(a)<EPS&&abs(b)<EPS) return l2.p1;
    return l2.p1+(l2.p2-l2.p1)*(b/a);
}

double arg(Point p){
    return atan2(p.y,p.x);
}

Point polar(double a,double r) {
    return Point(cos(r)*a,sin(r)*a);
}

Polygon getCrossPointCL(Circle c,Line l){
    Polygon ps;
    Point pr=project(l,c.c);
    Point e=(l.p2-l.p1)/abs(l.p2-l.p1);
    if(equals(getDistanceLP(l,c.c),c.r)){
        ps.emplace_back(pr);
        return ps;
    }
    double base=sqrt(c.r*c.r-norm(pr-c.c));
    ps.emplace_back(pr+e*base);
    ps.emplace_back(pr-e*base);
    return ps;
}

Polygon getCrossPointCS(Circle c,Segment s){
    Line l(s);
    Polygon res=getCrossPointCL(c,l);
    if(intersectCS(c,s)==2) return res;
    if(res.size()>1u){
        if(dot(l.p1-res[0],l.p2-res[0])>0) swap(res[0],res[1]);
        res.pop_back();
    }
    return res;
}

int main() {
    double x0,y0,r; cin>>x0>>y0>>r;
    Circle c(Point(x0,y0),r);
    int q; cin>>q;
    cout<<fixed<<setprecision(10);
    rep(i,q) {
        double x1,y1,x2,y2; cin>>x1>>y1>>x2>>y2;
        Line l(P(x1,y1),P(x2,y2));
        Polygon ans = getCrossPointCL(c,l);
        if (ans.size()==1) {
            rep(i,2) cout<<ans[0].x<<" "<<ans[0].y<<" ";
            cout<<endl;
            continue;
        }
        
        if (ans[0].x > ans[1].x) swap(ans[0],ans[1]);
        else if (ans[0].x==ans[1].x && ans[0].y>ans[1].y) swap(ans[0],ans[1]);
        rep(i,ans.size()) {
            cout<<ans[i].x<<" "<<ans[i].y<<" ";
        }
        cout<<endl;
    }
}


Measured memory_bytes: 3304