oj.uz

Submission #201545

# Submission time Handle Problem Language Result Execution time Memory
201545 2020-02-11T03:11:19 Z gs18115 Fences (JOI18_fences) C++14
51 / 100
 51 ms 1400 KB 
#include<iostream>
#include<iomanip>
#include<vector>
#include<cmath>
#include<algorithm>
#define ep emplace
#define eb emplace_back
#define fi first
#define se second
#define all(x) (x).begin(),(x).end()
#define semicolon ;
#define ryan bear
using namespace std;
typedef long long ll;
typedef pair<int,int>pi;
typedef pair<ll,ll>pl;
typedef pair<double,double>pd;
typedef pair<pd,pd>ln;
const int inf=1e9+7;
const ll INF=1e18;
const double eps=1e-6;
const ln xa(pd(0,0),pd(INF,0));
pd operator-(pd x,pd y)
{
    return pd(x.fi-y.fi,x.se-y.se);
}
inline double ccw(pd x,pd y)
{
    return x.fi*y.se-x.se*y.fi;
}
inline double sq(double x)
{
    return x*x;
}
inline double dist(pd x,pd y)
{
    return sqrt(sq(x.fi-y.fi)+sq(x.se-y.se));
}
inline double dot(pd x,pd y)
{
    return x.fi*y.fi+x.se*y.se;
}
inline bool cross1(ln x,ln y)
{
    bool xc=ccw(x.fi-y.fi,x.se-y.fi)*ccw(x.fi-y.se,x.se-y.se)<-eps;
    swap(x,y);
    bool yc=ccw(x.fi-y.fi,x.se-y.fi)*ccw(x.fi-y.se,x.se-y.se)<-eps;
    return xc&&yc;
}
inline bool cross2(ln x,ln y)
{
    bool xc=ccw(x.fi-y.fi,x.se-y.fi)*ccw(x.fi-y.se,x.se-y.se)<eps;
    swap(x,y);
    bool yc=ccw(x.fi-y.fi,x.se-y.fi)*ccw(x.fi-y.se,x.se-y.se)<eps;
    return xc&&yc;
}
inline pd cut(ln x,double r)
{
    return pd(x.fi.fi*(1-r)+x.se.fi*r,x.fi.se*(1-r)+x.se.se*r);
}
inline pd perp(pd x,ln y)
{
    double rs=0;
    double re=1;
    while(re-rs>eps)
    {
        double r1=(rs*2+re)/3;
        double r2=(rs+re*2)/3;
        if(dist(x,cut(y,r1))<dist(x,cut(y,r2)))
            re=r2;
        else
            rs=r1;
    }
    return cut(y,rs);
}
double d[505][505];
inline void init(int n)
{
    for(int i=0;i<n;i++)
        for(int j=0;j<n;j++)
            d[i][j]=INF;
    for(int i=0;i<n;i++)
        d[i][i]=0;
    return;
}
inline void app(int i,int j,double y)
{
    d[i][j]=min(d[i][j],y);
    d[j][i]=min(d[j][i],y);
    return;
}
vector<ln>rs;
inline void app(int i,int j,int sz,pd x,pd y)
{
    for(ln&t:rs)
        if(cross1(t,ln(x,y)))
            return;
    double nd=dist(x,y);
    if(cross1(xa,ln(x,y)))
        app(i,j+sz,nd),app(i+sz,j,nd);
    else
        app(i,j,nd),app(i+sz,j+sz,nd);
    return;
}
inline void floyd(int n)
{
    for(int k=0;k<n;k++)
        for(int i=0;i<n;i++)
            for(int j=0;j<n;j++)
                d[i][j]=min(d[i][j],d[i][k]+d[k][j]);
    return;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    double s;
    cin>>n>>s;
    vector<ln>v;
    vector<pd>rp;
    rp.eb(s,s),rp.eb(-s,s),rp.eb(-s,-s),rp.eb(s,-s);
    rs.eb(rp[0],rp[2]);
    rs.eb(rp[1],rp[3]);
    for(pd&t:rp)
        v.eb(t,t);
    for(int i=0;i<n;i++)
    {
        pd x,y;
        cin>>x.fi>>x.se>>y.fi>>y.se;
        if(cross2(xa,ln(x,y)))
        {
            if(x.se<y.se)
                swap(x,y);
            if(x.se>eps)
                v.eb(x,cut(ln(x,y),x.se/(x.se-y.se))),v.back().se.se+=eps;
            if(y.se<-eps)
                v.eb(cut(ln(x,y),x.se/(x.se-y.se)),y),v.back().fi.se-=eps;
        }
        else
            v.eb(x,y);
    }
    n=v.size();
    init(n*2);
    for(int i=0;i<n;i++)
    {
        for(int j=i+1;j<n;j++)
        {
            app(i,j,n,v[i].fi,v[j].fi);
            app(i,j,n,v[i].fi,v[j].se);
            app(i,j,n,v[i].se,v[j].fi);
            app(i,j,n,v[i].se,v[j].se);
            app(i,j,n,v[i].fi,perp(v[i].fi,v[j]));
            app(i,j,n,v[i].se,perp(v[i].se,v[j]));
            app(i,j,n,v[j].fi,perp(v[j].fi,v[i]));
            app(i,j,n,v[j].se,perp(v[j].se,v[i]));
        }
    }
    floyd(n*2);
    double m=INF;
    for(int i=0;i<n;i++)
        m=min(m,d[i][i+n]);
    cout<<fixed<<setprecision(12)<<m<<endl;
    return 0;
}

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 6 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 5 ms 376 KB Output is correct
17 Correct 5 ms 376 KB Output is correct
18 Correct 5 ms 376 KB Output is correct
19 Correct 5 ms 376 KB Output is correct
20 Correct 5 ms 376 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 6 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 5 ms 376 KB Output is correct
17 Correct 5 ms 376 KB Output is correct
18 Correct 5 ms 376 KB Output is correct
19 Correct 5 ms 376 KB Output is correct
20 Correct 5 ms 376 KB Output is correct
21 Correct 5 ms 376 KB Output is correct
22 Correct 5 ms 376 KB Output is correct
23 Correct 5 ms 376 KB Output is correct
24 Correct 5 ms 380 KB Output is correct
25 Correct 5 ms 504 KB Output is correct
26 Correct 5 ms 376 KB Output is correct
27 Correct 5 ms 508 KB Output is correct
28 Correct 5 ms 376 KB Output is correct
29 Correct 5 ms 376 KB Output is correct
30 Correct 5 ms 376 KB Output is correct
31 Correct 5 ms 376 KB Output is correct
32 Correct 6 ms 504 KB Output is correct
33 Correct 5 ms 376 KB Output is correct
34 Correct 5 ms 376 KB Output is correct
35 Correct 5 ms 376 KB Output is correct
36 Correct 5 ms 376 KB Output is correct
37 Correct 5 ms 376 KB Output is correct
38 Correct 5 ms 376 KB Output is correct
39 Correct 5 ms 376 KB Output is correct
40 Correct 5 ms 376 KB Output is correct
41 Correct 5 ms 376 KB Output is correct
42 Correct 5 ms 376 KB Output is correct
43 Correct 5 ms 380 KB Output is correct

Subtask #3
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 6 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 5 ms 376 KB Output is correct
17 Correct 5 ms 376 KB Output is correct
18 Correct 5 ms 376 KB Output is correct
19 Correct 5 ms 376 KB Output is correct
20 Correct 5 ms 376 KB Output is correct
21 Correct 5 ms 376 KB Output is correct
22 Correct 5 ms 376 KB Output is correct
23 Correct 5 ms 376 KB Output is correct
24 Correct 5 ms 380 KB Output is correct
25 Correct 5 ms 504 KB Output is correct
26 Correct 5 ms 376 KB Output is correct
27 Correct 5 ms 508 KB Output is correct
28 Correct 5 ms 376 KB Output is correct
29 Correct 5 ms 376 KB Output is correct
30 Correct 5 ms 376 KB Output is correct
31 Correct 5 ms 376 KB Output is correct
32 Correct 6 ms 504 KB Output is correct
33 Correct 5 ms 376 KB Output is correct
34 Correct 5 ms 376 KB Output is correct
35 Correct 5 ms 376 KB Output is correct
36 Correct 5 ms 376 KB Output is correct
37 Correct 5 ms 376 KB Output is correct
38 Correct 5 ms 376 KB Output is correct
39 Correct 5 ms 376 KB Output is correct
40 Correct 5 ms 376 KB Output is correct
41 Correct 5 ms 376 KB Output is correct
42 Correct 5 ms 376 KB Output is correct
43 Correct 5 ms 380 KB Output is correct
44 Correct 41 ms 1292 KB Output is correct
45 Correct 39 ms 1272 KB Output is correct
46 Correct 42 ms 1272 KB Output is correct
47 Correct 40 ms 1144 KB Output is correct
48 Correct 38 ms 1144 KB Output is correct
49 Correct 43 ms 1400 KB Output is correct
50 Correct 39 ms 1144 KB Output is correct
51 Correct 43 ms 1272 KB Output is correct
52 Correct 40 ms 1272 KB Output is correct
53 Correct 39 ms 1272 KB Output is correct
54 Correct 42 ms 1272 KB Output is correct
55 Correct 49 ms 1400 KB Output is correct
56 Correct 45 ms 1272 KB Output is correct
57 Correct 38 ms 1144 KB Output is correct
58 Correct 40 ms 1272 KB Output is correct
59 Correct 40 ms 1272 KB Output is correct
60 Correct 45 ms 1272 KB Output is correct
61 Correct 50 ms 1272 KB Output is correct
62 Correct 6 ms 504 KB Output is correct
63 Correct 6 ms 376 KB Output is correct
64 Correct 33 ms 1144 KB Output is correct
65 Correct 34 ms 1144 KB Output is correct
66 Correct 31 ms 1144 KB Output is correct
67 Correct 50 ms 1272 KB Output is correct
68 Correct 51 ms 1272 KB Output is correct
69 Incorrect 33 ms 1144 KB Output isn't correct
70 Halted 0 ms 0 KB -