OJ-Problems-Source/HDOJ/2327_autoAC.cpp
2016-08-22 00:13:12 +08:00

220 lines
6.0 KiB
C++

#include <iostream>
#include <cstdio>
#include <cstring>
#include <string>
#include <algorithm>
#include <cstdlib>
#include <cmath>
#include <map>
#include <sstream>
#include <queue>
#include <vector>
#define MAXN 100005
#define MAXM 211111
#define eps 1e-8
#define INF 50000001
using namespace std;
inline int dblcmp(double d)
{
if(fabs(d) < eps) return 0;
return d > eps ? 1 : -1;
}
struct point
{
double x, y;
point(){}
point(double _x, double _y): x(_x), y(_y) {}
void input()
{
scanf("%lf%lf", &x, &y);
}
bool operator ==(point a)const
{
return dblcmp(a.x - x) == 0 && dblcmp(a.y - y) == 0;
}
point sub(point p)
{
return point(x - p.x, y - p.y);
}
double dot(point p)
{
return x * p.x + y * p.y;
}
double det(point p)
{
return x * p.y - y * p.x;
}
double distance(point p)
{
return hypot(x - p.x, y - p.y);
}
}p[33];
struct line
{
point a, b;
line(){}
line(point _a, point _b){ a = _a; b = _b;}
void input()
{
a.input();
b.input();
}
int segcrossseg(line v)
{
int d1 = dblcmp(b.sub(a).det(v.a.sub(a)));
int d2 = dblcmp(b.sub(a).det(v.b.sub(a)));
int d3 = dblcmp(v.b.sub(v.a).det(a.sub(v.a)));
int d4 = dblcmp(v.b.sub(v.a).det(b.sub(v.a)));
if ((d1 ^ d2) == -2 && (d3 ^ d4) == -2)return 2;
return (d1 == 0 && dblcmp(v.a.sub(a).dot(v.a.sub(b))) <= 0||
d2 == 0 && dblcmp(v.b.sub(a).dot(v.b.sub(b))) <= 0||
d3 == 0 && dblcmp(a.sub(v.a).dot(a.sub(v.b))) <= 0||
d4 == 0 && dblcmp(b.sub(v.a).dot(b.sub(v.b))) <= 0);
}
int linecrossseg(line v)//v is seg
{
int d1 = dblcmp(b.sub(a).det(v.a.sub(a)));
int d2 = dblcmp(b.sub(a).det(v.b.sub(a)));
if ((d1 ^ d2) == -2) return 2;
return (d1 == 0 || d2 == 0);
}
point crosspoint(line v)
{
double a1 = v.b.sub(v.a).det(a.sub(v.a));
double a2 = v.b.sub(v.a).det(b.sub(v.a));
return point((a.x * a2 - b.x * a1) / (a2 - a1), (a.y * a2 - b.y * a1) / (a2 - a1));
}
};
struct node
{
string name;
vector<line>seg;
};
char sa[55], sb[55];
vector<node>g;
vector<string>ans[55];
bool cmp(node x, node y)
{
return x.name < y.name;
}
bool ok(int k1, int k2)
{
int sz1 = g[k1].seg.size();
int sz2 = g[k2].seg.size();
for(int i = 0; i < sz1; i++)
for(int j = 0; j < sz2; j++)
if(g[k1].seg[i].segcrossseg(g[k2].seg[j])) return true;
return false;
}
void solve()
{
for(int i = 0; i < 50; i++) ans[i].clear();
sort(g.begin(), g.end(), cmp);
int sz = g.size();
for(int i = 0; i < sz; i++)
{
for(int j = 0; j < sz; j++)
{
if(i == j) continue;
if(ok(i, j)) ans[i].push_back(g[j].name);
}
}
for(int i = 0; i < sz; i++)
{
if(ans[i].size() == 0) printf("%s has no intersections\n", g[i].name.c_str());
else
{
if(ans[i].size() == 1)
{
printf("%s intersects with %s\n", g[i].name.c_str(), ans[i][0].c_str());
}
else if(ans[i].size() == 2)
{
printf("%s intersects with %s and %s\n", g[i].name.c_str(), ans[i][0].c_str(), ans[i][1].c_str());
}
else
{
printf("%s intersects with ", g[i].name.c_str());
for(int j = 0; j < ans[i].size() - 1; j++) printf("%s, ", ans[i][j].c_str());
printf("and %s\n", ans[i][ans[i].size() - 1].c_str());
}
}
}
g.clear();
printf("\n");
}
int main()
{
double xa, ya, xb, yb;
while(scanf("%s", sa) != EOF)
{
if(strcmp(sa, "-") == 0)
{
solve();
continue;
}
if(strcmp(sa, ".") == 0) break;
node tmp;
tmp.name = sa;
scanf("%s", sb);
if(sb[0] == 's')
{
point a, c;
scanf(" (%lf,%lf)", &a.x, &a.y);
scanf(" (%lf,%lf)", &c.x, &c.y);
point b, d;
double x, y, mx, my;
mx = (a.x + c.x)/2.0, my = (a.y + c.y) / 2.0;
x = a.x - mx; y = a.y - my;
b.x = -y + mx; b.y = x + my;
x = c.x - mx; y = c.y - my;
d.x = - y + mx; d.y = x + my;
tmp.seg.push_back(line(a, b));
tmp.seg.push_back(line(b, c));
tmp.seg.push_back(line(a, d));
tmp.seg.push_back(line(c, d));
}
else if(sb[0] == 'l')
{
point a, b;
scanf(" (%lf,%lf)", &a.x, &a.y);
scanf(" (%lf,%lf)", &b.x, &b.y);
tmp.seg.push_back(line(a, b));
}
else if(sb[0] == 't')
{
point a, b, c;
scanf(" (%lf,%lf)", &a.x, &a.y);
scanf(" (%lf,%lf)", &b.x, &b.y);
scanf(" (%lf,%lf)", &c.x, &c.y);
tmp.seg.push_back(line(a, b));
tmp.seg.push_back(line(a, c));
tmp.seg.push_back(line(b, c));
}
else if(sb[0] == 'r')
{
point a, b, c, d;
scanf(" (%lf,%lf)", &a.x, &a.y);
scanf(" (%lf,%lf)", &b.x, &b.y);
scanf(" (%lf,%lf)", &c.x, &c.y);
double dx = b.x - a.x;
d.x = c.x - dx;
double dy = b.y - a.y;
d.y = c.y - dy;
tmp.seg.push_back(line(a, b));
tmp.seg.push_back(line(b, c));
tmp.seg.push_back(line(a, d));
tmp.seg.push_back(line(c, d));
}
else
{
int t;
scanf("%d", &t);
for(int i = 0; i < t; i++) scanf(" (%lf,%lf)", &p[i].x, &p[i].y);
for(int i = 0; i < t; i++) tmp.seg.push_back(line(p[i], p[(i + 1) % t]));
}
g.push_back(tmp);
}
return 0;
}