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#639278#9458. TriangulationAfterlifeTL 331ms114492kbC++174.1kb2024-10-13 18:41:192024-10-13 18:41:20

Judging History

你现在查看的是最新测评结果

  • [2024-10-13 18:41:20]
  • 评测
  • 测评结果:TL
  • 用时:331ms
  • 内存:114492kb
  • [2024-10-13 18:41:19]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;

#define int long long

int T;

const int N=18;

int w[N][N];

struct P {
    int x,y;
    int id;
};

bool operator <(const P &a,const P &b)
{
    return a.x<b.x||(a.x==b.x&&a.y<b.y);
}

P operator -(const P &a,const P &b)
{
    return {a.x-b.x,a.y-b.y};
}

int det(const P &a,const P &b)
{
    return a.x*b.y-a.y*b.x;
}

int n;

vector<P> p;

int ok[N][N][N];

vector<P> conv(vector<P> v)
{
    vector<P> c;
    sort(v.begin(),v.end());
    for(auto p:v)
    {
        while(c.size()>1&&det(p-c.back(),p-c.end()[-2])>=0)
            c.pop_back();
        c.push_back(p);
    }
    int m=c.size();
    reverse(v.begin(),v.end());
    for(auto p:v)
    {
        while(c.size()>m&&det(p-c.back(),p-c.end()[-2])>=0)
            c.pop_back();
        c.push_back(p);
    }
    c.pop_back();
    return c;
}

using pii=pair<int,int>;

pii merge(const pii &a,const pii &b)
{
    if(a.first<b.first)
        return a;
    else if(a.first>b.first)
        return b;
    else
        return {a.first,a.second+b.second};
}

pii f[1<<N][N];

int ed,v[1<<N][N];

pii dfs(int S,int l)
{
    if(S==ed)
        return {0,1};
    if(v[S][l])
        return f[S][l];
    v[S][l]=1;
    pii &ret=f[S][l];
    ret.first=1e18;
    vector<int> vs;
    for(int i=0;i<n;i++)
        if(S>>i&1)
            vs.push_back(i);
    int e=0;
    for(int i=1;i+1<n;i++)
    {
        while(e+1<vs.size()&&vs[e+1]<=i)
            e++;
        if(i==l)
            continue;
        if(i<l)
        {
            int T=S|(1<<i)|(1<<l);
            T>>=i+1;
            if(__builtin_ctz(T)!=(l-i-1))
                continue;
        }
        if(S>>i&1)
        {
            int j=vs[e-1],k=vs[e+1];
            if(ok[j][i][k]==-1)
            {
                auto W=dfs(S^(1<<i),i);
                W.first+=w[j][k];
                ret=merge(ret,W);
            }
        }
        else
        {
            int j=vs[e],k=vs[e+1];
            if(ok[j][i][k]==1)
            {
                auto W=dfs(S^(1<<i),i);
                W.first+=w[j][i]+w[i][k];
                ret=merge(ret,W);
            }
        }
    }
    return ret;
}

signed main()
{
    cin>>T;
    while(T--)
    {
        cin>>n;
        p.resize(n);
        int z=0;
        int cs=rand()%1000,sn=rand()%1000;
        for(auto &[x,y,id]:p)
        {
            id=z++;
            cin>>x>>y;
            int u=cs*x-sn*y,v=sn*x+cs*y;
            x=u,y=v;
        }
        sort(p.begin(),p.end());
        vector<int> pos(n);
        for(int i=0;i<n;i++)
            pos[p[i].id]=i;
        for(int i=0;i<n;i++)
            for(int j=0;j<n;j++)
                cin>>w[pos[i]][pos[j]];
        for(int i=0;i<n;i++)
            p[i].id=i;
        for(int i=0;i<n;i++)
            for(int j=i+1;j<n;j++)
                for(int k=j+1;k<n;k++)
                {
                    auto z=conv({p[i],p[j],p[k]});
                    ok[i][j][k]=1;
                    for(int l=0;l<n;l++)
                    {
                        auto u=p[l];
                        bool in=1;
                        for(int j=0;j<3;j++)
                            if(det(z[(j+1)%3]-z[j],u-z[j])<=0)
                                in=0;
                        if(in)
                            ok[i][j][k]=0;
                    }
                    if(!ok[i][j][k])
                        continue;
                    if(det(p[j]-p[i],p[k]-p[i])>0)
                        ok[i][j][k]=-1;
                }
        for(int S=0;S<(1<<n);S++)
            for(int i=0;i<n;i++)
                v[S][i]=0;
        auto c=conv(p);
        auto m=max_element(c.begin(),c.end())-c.begin();
        ed=0;
        int st=0;
        for(int i=0;i<=m;i++)
            st|=1<<c[i].id;
        for(int j=m;j<c.size();j++)
            ed|=1<<c[j].id;
        ed|=1<<c[0].id;
        auto ans=dfs(st,0);
        for(int i=0;i+1<=m;i++)
            ans.first+=w[c[i].id][c[i+1].id];
        cout<<ans.first<<" "<<ans.second<<"\n";
    }
}

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 5616kb

input:

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

output:

5 2
6 1

result:

ok 2 lines

Test #2:

score: 0
Accepted
time: 331ms
memory: 114492kb

input:

68
3
454 364
117 336
271 84
0 6 2
6 0 10
2 10 0
4
454 364
117 336
271 84
274 296
0 3 2 10
3 0 6 4
2 6 0 5
10 4 5 0
4
603 817
230 695
230 303
604 183
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
5
454 364
117 336
271 84
274 296
220 225
0 1 7 3 2
1 0 4 4 2
7 4 0 1 5
3 4 1 0 0
2 2 5 0 0
5
666667 788675
333173 78858...

output:

18 1
30 1
0 2
27 1
38 2
35 5
54 1
44 2
18 14
69 1
12 1
88 42
59 1
23 8
180 150
80 1
23 2
0 780
30 12
504 4550
30 4
19656 26888
29 6
26700 168942
24 88
22770 1098904
21 28
30816 7281984
24 27
15327 49789428
24 4
16338 342305320
21 48
42615 2410168190
22 360
44928 17309628327
1240448 1
2613579 1
19532...

result:

ok 68 lines

Extra Test:

score: -3
Extra Test Failed : Time Limit Exceeded on 2

input:

70
18
523990 661228
542094 867454
715348 957693
724847 921955
185285 504782
340889 164109
548808 628313
528132 176875
403401 165509
733176 362440
62653 306280
841647 146408
169951 295342
186442 591918
405268 31651
207390 724432
622724 775650
495011 800641
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 ...

output:

0 89323676
0 130331234
0 144675335
0 94323563
0 213829766
0 118195574
0 170444382
0 181328906
0 123390508
0 294695268
0 138491802
0 350786299
0 318187474
0 150111020
0 103700636
0 269957872
0 206602029
0 176150490
0 56950772
0 285570660
0 201339302
0 152004614
0 340341158
0 84076794
0 54258411

result: