QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#672488#5067. Two Wallsqinglu09WA 181ms3948kbC++238.4kb2024-10-24 17:00:572024-10-24 17:00:58

Judging History

你现在查看的是最新测评结果

  • [2024-10-24 17:00:58]
  • 评测
  • 测评结果:WA
  • 用时:181ms
  • 内存:3948kb
  • [2024-10-24 17:00:57]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long long LL;
#define endl '\n'
#define per(i, a, b) for(int i = (a); i >= (b); i--)
#define rep(i, a, b) for(int i = (a); i <= (b); i++)
typedef pair<int,int> PII;
typedef long double ld;
#define ld double
const int N=1e5+10;
const ld eps=1e-12;
#define debug(x) cout<<#x<<": "<<x<<endl

const double pi = acos(-1.0);
const double pi1=pi/180,pi2=180/pi;
double dtopi(double x) {return x*pi1;}
double pitod(double x) {return x*pi2;}
int sgn(double x) 
{
    if(fabs(x)<eps) return 0;	// x == 0, 精度范围内的近似相等
    return x>0?1:-1;			// 返回正负
}

typedef struct point 
{
    double x,y;
    point(double x = 0, double y = 0) : x(x), y(y) {}
    double operator * (point b) {return x*b.x+y*b.y;}//点乘
	double operator ^ (point b) {return x*b.y-y*b.x;}//叉乘
	point operator + (point b) {return point(x+b.x,y+b.y);}
	point operator - (point b) {return point(x-b.x,y-b.y);}
	bool operator == (const point &b) const {return sgn(x-b.x)==0&&sgn(y-b.y)==0;}
	bool operator < (const point &b) const {return sgn(x-b.x)==0?sgn(y-b.y)<0:x<b.x;}
	bool operator > (point b) {return !(*this<b);}
	point operator * (double k) {return point(k*x,k*y);}//数乘
	point operator / (double k) {return point(x/k,y/k);}//数除
    double len() {return hypot(x,y);}//模长
	double len2() {return x*x+y*y;}//模长平方
	point trunc(double r) {double l=len();r/=l;return point(x*r,y*r);}//变模长为r
	double dis(point b){return hypot(x-b.x,y-b.y);}
	double angle() {return atan2(y,x);}
	int quad() {return sgn(y)>0||sgn(y)==0&&sgn(x)>0;}//0:[-π,0)  1:[0,π)
	point unit() {return *this/len();}//单位向量
}Vector;
double len(Vector a) {return sqrt(a*a);}//模长
double len2(Vector a) {return a*a;}//模长
double dis(point a,point b) {return (a-b).len();}
double dis2(point a,point b) {return (a-b).len2();}
double norm(double x)//返回弧度[0,2π)
{
    while(x<0) x+=2*pi;
    while(x>=2*pi) x-=2*pi;
    return x;
}

double angle(Vector a,Vector b)//a到b的夹角
{
    double t=acos((a*b)/len(a)/len(b));
    return t;           // 返回 [0,π]
    //return pitod(t);  // 返回 [0,180]
}

double rad(Vector a,Vector b)//角aob弧度大小
{
	return fabs(atan2(fabs(a^b),a*b));
}

point rotleft(point a) {return point(-a.y,a.x);}//逆时针旋转90度
point rotright(point a) {return point(a.y,-a.x);}//顺时针旋转90度
point rotate(point a,point o,double angle)//点a绕点p逆时针旋转弧度angle [0,π]
{
	point v=a-o;
	double c=cos(angle),s=sin(angle);
	return point(o.x+v.x*c-v.y*s,o.y+v.x*s+v.y*c);
}
Vector Rotate(Vector a,double angle)//向量旋转弧度angle [0,π]
{
    Vector b(sin(angle),cos(angle));
    return Vector(a^b,a*b);
}

//1:  b在a的逆时针方向
//-1: b在a的顺时针方向
//2:  b与a同向共线
//-2: b在a反向共线
int cross(Vector a,Vector b)//向量b与a的方位关系
{
	int x=sgn(a^b),y=sgn(a*b);
	if(x!=0) return x;
	else return 2*y;
}
bool sameline(point a,point b,point c) {return sgn((b-a)^(c-b))==0;}//三点共线
double cross(point a,point b,point c) {return (b-a)^(c-a);}//ab叉乘ac
double dot(point a,point b,point c) {return (b-a)*(c-a);}//ab点乘ac

typedef struct line
{
	point s,e;
	line(){}
	line(point _s,point _e) {s =_s; e= _e;}
	line(point p,double angle)//点斜
	{
		s=p;
		if(sgn(angle-pi/2)==0)  e=(s+point(0,1));
		else e=(s+point(1,tan(angle)));
	}
	line(double a,double b,double c)//ax+by+c=0;
	{
		if(sgn(a)==0) {s=point(0,-c/b);e=point(1,-c/b);}
		else if(sgn(b)==0) {s=point(-c/a,0);e=point(-c/a,1);}
		else {s=point(0,-c/b);e=point(1,(-c-a)/b);}
	}
	double length() {return s.dis(e);}//线段长度
	double angle1()//返回[0,π]的基于x轴的斜倾角(弧度制)
	{
		double k=atan2(e.y-s.y,e.x-s.x);
		if(sgn(k)<0) k+=pi;
		if(sgn(k-pi)==0) k-=pi;
		return k;
	}
	double angle2()//返回(-π,π]的基于x正半轴的斜倾角(弧度制)
	{
		return atan2(e.y-s.y,e.x-s.x);
	}
}seg;

//-1: 在右侧(顺时针)
//1:  在左侧(逆时针)
//0:  在直线上
int relation_p_l(point p,line l) {return sgn((p-l.s)^(l.e-l.s));}//点与直线关系

double dis_p_l(point p,line l) {return fabs((p-l.s)^(l.e-l.s))/l.length();}//点到直线的距离

point prog(point p,line l)//点p在直线l上的投影点(垂足)
{
	point x=l.e-l.s;
	return l.s+((x*(x*(p-l.s)))/(x.len2()));
}

point mirror(point p,line l)//点p在直线l上的对称点
{
	point q=prog(p,l);
	return point(2*q.x-p.x,2*q.y-p.y);
}

bool relation_p_seg(point p,seg l)//点是否在线段上
{
	return sgn((p-l.s)^(l.e-l.s))==0&&sgn((p-l.s)*(p-l.e))<=0;
}

double dis_p_seg(point p,seg l)//点到线段的距离
{
	if(sgn((p-l.s)*(l.e-l.s))<0||sgn((p-l.e)*(l.s-l.e))<0)
		return min(p.dis(l.s),p.dis(l.e));
	return dis_p_l(p,l);
}

bool parallel(line l,line v) {return sgn((l.e-l.s)^(v.e-v.s))==0;}//判断平行

//0:  平行
//1:  共线
//-1: 相交
int relation_l_l(line l,line v)//判断两直线的位置关系
{
	if(parallel(l,v)) return relation_p_l(l.s,v)==0;
	return -1;
}

//-1: 规范相交
//1:  非规范相交(顶点处相交)
//0:  不相交
int relation_l_seg(line l,seg v)//直线与线段位置关系
{
	int d1=sgn((l.e-l.s)^(v.s-l.s));
	int d2=sgn((l.e-l.s)^(v.e-l.s));
	if((d1^d2)==-2) return -1;
	return (d1==0||d2==0);
}

//-1: 规范相交(恰有一个交点且非端点,即互相穿过)
//1:  非规范相交
//0:  不相交
int relation_seg_seg(seg l,seg v)//两线段相交判断
{
	int d1=sgn((l.e-l.s)^(v.s-l.s));
	int d2=sgn((l.e-l.s)^(v.e-l.s));
	int d3=sgn((v.e-v.s)^(l.s-v.s));
	int d4=sgn((v.e-v.s)^(l.e-v.s));
	if ((d1^d2)==-2&&(d3^d4)==-2) return -1;
	
	return (d1==0&&sgn((v.s-l.s)*(v.s-l.e))<=0)||
	(d2==0&&sgn((v.e-l.s)*(v.e-l.e))<=0)||
	(d3==0&&sgn((l.s-v.s)*(l.s-v.e))<=0)||
	(d4==0&&sgn((l.e-v.s)*(l.e-v.e))<=0);
}

double dis_seg_seg(seg l,seg v)//线段到线段的距离
{
	if(relation_seg_seg(l,v)) return 0; 
	return min(min(dis_p_seg(v.s,l),dis_p_seg(v.e,l)),min(dis_p_seg(l.s,v),dis_p_seg(l.e,v)));
}

bool lcrossl(line a,line b)//求两直线的交点(需要保证直线不平行或共线)
{	
	point u=a.s-b.s,v=a.e-a.s,w=b.e-b.s;

	//***************************
	if((w^v)==0)//o2优化出问题的时候直接返回mle,
	{
		vector<int>q;
		while(1) q.push_back(1);
	}
	//***************************

  	double t=(u^w)/(w^v);
  	return sgn(t)>=0;
}

void solve()
{
	point a,b;
	cin>>a.x>>a.y;
	cin>>b.x>>b.y;
	point h1,h2,g1,g2;
	cin>>h1.x>>h1.y>>h2.x>>h2.y;
	cin>>g1.x>>g1.y>>g2.x>>g2.y;
	seg now(a,b),h(h1,h2),g(g1,g2);
    if(a==b)
    {
        cout<<0<<endl;
        return;
    }
	if(relation_seg_seg(now,h)==0&&relation_seg_seg(now,g)==0)
	{
		cout<<0<<endl;
	}
	else
	{
		vector<line>A,B;
		if(relation_seg_seg(seg(a,h1),g)!=-1) A.push_back(line(a,h1));
		if(relation_seg_seg(seg(a,h2),g)!=-1) A.push_back(line(a,h2));
		if(relation_seg_seg(seg(a,g1),h)!=-1) A.push_back(line(a,g1));
		if(relation_seg_seg(seg(a,g2),h)!=-1) A.push_back(line(a,g2));
		if(relation_seg_seg(seg(b,h1),g)!=-1) B.push_back(line(b,h1));
		if(relation_seg_seg(seg(b,h2),g)!=-1) B.push_back(line(b,h2));
		if(relation_seg_seg(seg(b,g1),h)!=-1) B.push_back(line(b,g1));
		if(relation_seg_seg(seg(b,g2),h)!=-1) B.push_back(line(b,g2));
		for(auto x:A)
		{
			for(auto y:B)
			{
				if(relation_l_l(x,y)==-1)
                {
                    if(lcrossl(x,y) && lcrossl(y, x))
					{
						cout<<1<<endl;
						return;
					}
                    // Vector u=point(x.e-x.s);
                    // Vector v=point(z-x.s);
                    // Vector u1=point(y.e-y.s);
                    // Vector v1=point(z-y.s);
                    // if(sgn(u*v)>0&&sgn(u1*v1)>0)
                    // {
					// 	// debug(x.e.x);
					// 	// debug(x.e.y);
					// 	// debug(x.s.x);
					// 	// debug(x.s.y);
					// 	// debug(y.e.x);
					// 	// debug(y.e.y);
					// 	// debug(y.s.x);
					// 	// debug(y.s.y);
					// 	// debug(z.x);
					// 	// debug(z.y);
					// 	// debug(u.x);
					// 	// debug(u.y);
					// 	// debug(v.x);
					// 	// debug(v.y);
                    //     cout<<1<<endl;
                    //     return;
                    // }
                }
			}
		}
		cout<<2<<endl;
	}
}

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0),cout.tie(0);

	int T=1;
	cin>>T;
	while(T--)
	{
		solve();
	}
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3804kb

input:

3
0 0
1 1
2 2 3 3
4 4 5 5
0 0
1 1
2 2 3 3
2 2 3 3
0 0
10 10
10 0 0 10
1 1 2 2

output:

0
0
1

result:

ok 3 number(s): "0 0 1"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3872kb

input:

2
-999999999 999999998
999999999 999999998
-1000000000 -1000000000 1000000000 1000000000
1000000000 -1000000000 -1000000000 1000000000
-999999999 999999998
999999999 999999998
-999999998 -999999998 1000000000 1000000000
999999998 -999999998 -1000000000 1000000000

output:

2
1

result:

ok 2 number(s): "2 1"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3944kb

input:

1
0 0
1 1
2 2 3 3
4 4 5 5

output:

0

result:

ok 1 number(s): "0"

Test #4:

score: 0
Accepted
time: 171ms
memory: 3836kb

input:

100000
-851839419 34688642
-667081997 395784949
-624068418 -155389155 119194510 -758711821
-992436155 -812775173 851861070 -592596572
974613003 -179673992
-485749861 520596304
-115838823 -265233646 -573799007 -222234500
608830643 -887109945 483106217 -906910755
-597593284 384264657
940783 476657007
...

output:

0
0
0
0
0
0
1
0
0
0
0
1
0
0
1
1
0
0
1
1
1
0
1
0
0
1
0
1
0
0
0
0
0
1
0
0
1
0
1
0
0
0
0
0
1
1
1
1
1
0
1
1
0
0
0
0
1
1
0
1
0
0
0
0
0
0
0
0
1
1
0
1
0
0
1
0
0
0
0
1
1
1
1
1
1
0
0
0
1
1
1
0
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
1
1
1
0
1
1
0
0
0
0
0
0
1
0
1
1
0
1
0
0
1
0
0
1
1
0
0
0
1
0
1
0
1
0
0
0
1
1
...

result:

ok 100000 numbers

Test #5:

score: 0
Accepted
time: 175ms
memory: 3804kb

input:

100000
-496405053 -492673762
111401587 764822338
-588077735 774345046 959995351 -972693439
-729349041 -573156496 326664422 645305810
-477016787 -561855978
697257071 461011057
-416669921 377733217 784674141 -204150537
695471214 -642123788 -968584097 801626277
-329331824 68483816
945230774 982358552
-...

output:

1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
1
0
0
1
0
0
0
0
0
0
0
0
0
1
1
0
1
1
1
1
1
0
1
1
0
1
1
1
0
0
1
1
0
1
0
0
0
0
0
1
0
0
0
0
0
0
1
0
1
1
0
1
0
1
0
0
0
0
1
1
0
1
1
0
0
0
1
1
1
1
1
1
0
1
1
0
0
0
0
0
1
0
1
0
1
1
1
0
1
1
1
1
1
1
1
1
0
0
0
0
0
1
0
1
0
0
1
1
0
1
0
1
0
1
0
0
1
1
1
0
0
0
0
0
0
0
1
1
1
1
...

result:

ok 100000 numbers

Test #6:

score: 0
Accepted
time: 172ms
memory: 3752kb

input:

100000
153996608 390029247
838007668 -918017777
-257119758 -244043252 390730779 813324945
-761229221 -38570526 634492154 -116791808
19475923 760994742
-119735998 991360398
-665623518 -632455126 -394909798 -481033868
-974798424 140919454 -715241704 510163308
-61070363 -542264319
-353569028 -511939904...

output:

1
0
0
1
1
1
0
0
0
1
1
0
1
1
0
0
0
1
0
1
1
1
1
0
1
1
1
1
0
1
0
0
0
1
1
0
0
1
0
0
1
1
0
0
0
1
0
0
0
1
0
1
1
0
1
0
1
0
1
1
1
0
0
0
1
0
0
0
0
0
1
1
1
0
0
0
1
0
1
0
0
1
0
1
1
0
1
0
1
0
0
1
0
0
0
0
0
0
1
0
1
1
0
0
1
0
0
0
0
1
0
0
1
0
1
1
0
1
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
1
1
1
1
0
0
1
0
0
0
...

result:

ok 100000 numbers

Test #7:

score: 0
Accepted
time: 171ms
memory: 3880kb

input:

100000
509430974 -432300451
-140418957 -600857890
-464218867 442601156 -768468380 61286241
-203174812 201048150 404262799 826143280
567846134 673780049
525213848 983652653
-671487323 600446325 963563350 -462949905
-888157854 628995403 -166932017 218700340
207191097 898865049
590720963 288728935
4143...

output:

0
0
0
1
0
0
1
1
0
0
1
0
0
1
0
0
0
0
1
0
0
1
0
0
0
0
0
0
0
0
0
1
1
1
0
0
1
1
0
1
1
0
1
0
0
0
0
0
0
1
0
1
0
1
1
0
0
0
0
0
0
1
0
1
1
0
0
0
1
1
0
0
0
0
0
0
1
0
1
0
1
0
0
0
1
1
1
0
0
0
1
1
0
0
0
1
0
0
0
0
1
1
0
0
1
0
1
1
0
1
1
1
0
0
0
0
0
0
0
1
1
1
0
0
1
1
0
0
0
0
0
0
1
1
1
0
1
0
0
1
0
0
0
0
0
1
1
0
1
0
...

result:

ok 100000 numbers

Test #8:

score: 0
Accepted
time: 171ms
memory: 3816kb

input:

100000
-840167367 450402558
586187125 -231820501
-428228185 -627664644 367299755 142271917
59912302 735634121 469000739 64045662
-935661158 291598063
-291779221 -780965301
-920440920 -409742018 -216020590 965199471
-801517283 -587961356 -156679415 465294457
423575055 583084208
-759956341 794430480
8...

output:

1
1
1
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
1
0
1
0
0
0
1
1
0
0
1
0
0
1
1
1
0
1
0
1
0
0
1
0
0
0
1
1
1
0
0
0
0
0
0
1
1
0
1
0
1
0
0
0
1
0
1
1
0
1
0
0
1
0
0
1
1
1
0
1
1
0
0
0
0
0
0
1
0
0
0
1
0
0
1
1
0
0
1
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result:

ok 100000 numbers

Test #9:

score: 0
Accepted
time: 175ms
memory: 3696kb

input:

100000
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output:

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result:

ok 100000 numbers

Test #10:

score: 0
Accepted
time: 160ms
memory: 3612kb

input:

100000
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output:

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result:

ok 100000 numbers

Test #11:

score: 0
Accepted
time: 178ms
memory: 3884kb

input:

100000
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output:

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...

result:

ok 100000 numbers

Test #12:

score: 0
Accepted
time: 175ms
memory: 3692kb

input:

100000
824659891 866116474
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output:

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result:

ok 100000 numbers

Test #13:

score: 0
Accepted
time: 175ms
memory: 3660kb

input:

100000
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output:

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result:

ok 100000 numbers

Test #14:

score: 0
Accepted
time: 172ms
memory: 3664kb

input:

100000
417121618 686474839
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output:

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result:

ok 100000 numbers

Test #15:

score: 0
Accepted
time: 174ms
memory: 3880kb

input:

100000
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output:

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result:

ok 100000 numbers

Test #16:

score: 0
Accepted
time: 168ms
memory: 3660kb

input:

100000
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output:

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result:

ok 100000 numbers

Test #17:

score: 0
Accepted
time: 181ms
memory: 3812kb

input:

100000
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output:

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result:

ok 100000 numbers

Test #18:

score: 0
Accepted
time: 172ms
memory: 3728kb

input:

100000
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output:

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result:

ok 100000 numbers

Test #19:

score: 0
Accepted
time: 176ms
memory: 3948kb

input:

100000
489260742 -15108237
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output:

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result:

ok 100000 numbers

Test #20:

score: 0
Accepted
time: 176ms
memory: 3732kb

input:

100000
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output:

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result:

ok 100000 numbers

Test #21:

score: 0
Accepted
time: 174ms
memory: 3836kb

input:

100000
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output:

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1
1
1
0
0
0
0
0
0
1
1
1
0
1
0
1
1
1
1
1
1
1
1
1
0
0
1
1
1
0
0
1
1
0
1
1
0
1
1
0
1
0
1
0
0
1
0
0
1
1
0
0
1
0
1
0
0
0
0
0
0
0
1
0
0
0
1
0
1
0
1
0
0
1
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
1
1
0
1
0
1
0
0
1
1
0
1
0
1
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
1
0
0
0
0
...

result:

ok 100000 numbers

Test #22:

score: 0
Accepted
time: 177ms
memory: 3640kb

input:

100000
-201346367 -482097330
742768969 -19865188
-736593719 -113444726 474661760 -223932141
-808531390 -517960081 90097774 -667493854
200613819 -45779385
-931316230 -132533405
-623661790 -69997546 18078824 -4421275
767936371 -65390910 -337906780 -987608637
-961151 -652048957
-473308476 -637997027
-5...

output:

1
0
0
0
0
0
1
0
0
1
0
1
1
1
1
1
0
1
0
1
0
0
1
1
1
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
1
0
0
1
0
0
1
1
0
0
0
0
0
0
0
0
0
0
1
0
1
1
1
0
0
0
1
0
1
1
1
0
0
0
1
0
0
1
0
1
1
0
0
0
0
0
0
0
1
0
1
0
1
0
0
0
0
1
1
0
0
0
0
1
1
0
1
0
1
0
1
0
0
1
1
0
1
1
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
1
1
1
0
0
1
0
0
0
...

result:

ok 100000 numbers

Test #23:

score: 0
Accepted
time: 176ms
memory: 3676kb

input:

100000
889700307 83152852
81040013 -449413311
374958682 300600303 -247400099 -855076598
-624900532 -785317715 857266066 -410224840
872271274 -850603331
-975572718 973091933
421906561 -222540906 -675309230 591089749
-544630032 -809400213 70027428 -810848022
902977690 -179653965
-183689299 262567523
7...

output:

0
1
0
0
1
1
0
0
0
1
1
0
1
0
0
1
0
0
0
1
1
1
0
0
1
0
0
0
1
0
0
0
0
0
1
0
1
0
1
1
1
1
0
1
0
1
1
0
0
0
0
1
0
0
0
0
0
1
0
1
1
2
1
0
0
1
1
0
0
1
1
1
1
1
1
0
0
0
1
0
1
0
0
0
0
1
0
0
1
1
1
1
0
0
0
1
0
0
0
0
1
0
0
0
1
1
0
1
1
1
1
0
0
0
1
1
1
1
0
0
1
0
0
0
1
1
0
0
0
1
1
1
0
1
0
0
0
0
1
0
0
0
0
1
1
1
1
0
0
1
...

result:

ok 100000 numbers

Test #24:

score: -100
Wrong Answer
time: 70ms
memory: 3768kb

input:

45369
0 0
0 -1
999999997 999999997 -999999997 -999999998
-999999997 -999999997 999999997 999999998
0 0
0 -1
999999997 999999997 -999999997 -1000000000
-999999997 -999999997 999999997 999999998
0 0
0 -1
999999997 999999997 -999999998 -999999997
-999999997 -999999997 999999997 999999998
0 0
0 -1
99999...

output:

1
0
0
1
1
0
0
1
0
0
0
1
0
0
1
1
0
0
1
0
0
0
1
0
0
1
1
0
0
1
0
0
0
2
1
1
2
1
1
1
2
1
1
1
1
0
0
1
1
0
0
1
0
0
0
1
0
0
1
1
0
0
1
0
0
0
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
1
1
1
2
1
1
1
1
0
0
1
1
0
0
1
0
0
0
1
0
0
1
1
0
0
1
0
0
0
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
1
0
0
...

result:

wrong answer 38th numbers differ - expected: '2', found: '1'