Submission #683332

#	Time	Username	Problem	Language	Result	Execution time	Memory
683332		groshi	Wall (CEOI14_wall)	C++17	100 / 100	610 ms	171764 KiB

wall

#include<bits/stdc++.h>
using namespace std;
int t[500][500];
int kraw1[500][500];
int kraw2[500][500];
long long odw[200000];
int skad[200000];
bool bylo[200000];
vector<pair<int,int> > Q;
map<int,int> krawedz[700000];
map<int,bool> specjalna[700000];
int n,m;
struct wi{
    vector<pair<int,int> > Q;
    int bylo=0;
    long long odw=0;
}*w;
void dodaj(int x)
{
    while(x!=0)
    {
        specjalna[x][skad[x]]=1;
        specjalna[skad[x]][x]=1;
        x=skad[x];
    }
}
void obwod(int x1,int y1)
{
    int x=(x1-1)*(m+1)+y1-1;
    int y=(x1-1)*(m+1)+y1;
    specjalna[x][y]=1;
    specjalna[y][x]=1;
    x=x1*(m+1)+y1;
    specjalna[x][y]=1;
    specjalna[y][x]=1;
    y=x1*(m+1)+y1-1;
    specjalna[x][y]=1;
    specjalna[y][x]=1;
    x=(x1-1)*(m+1)+y1-1;
    specjalna[x][y]=1;
    specjalna[y][x]=1;
}
int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>m;
    w=new wi[4*(n+1)*(m+1)+100];
    int d[4]={m+1,-(m+1),1,-1};
    for(int i=1;i<=n;i++)
        for(int j=1;j<=m;j++)
        {
            cin>>t[i][j];
            if(t[i][j])
                Q.push_back({i,j});
        }
    for(int i=1;i<=n;i++)
        for(int j=1;j<=m+1;j++)
        {
            cin>>kraw1[i][j];
            int x1=(i-1)*(m+1)+j-1;
            int y1=i*(m+1)+j-1;
            krawedz[x1][y1]=kraw1[i][j];
            krawedz[y1][x1]=kraw1[i][j];
        }
    for(int i=1;i<=n+1;i++)
        for(int j=1;j<=m;j++)
        {
            cin>>kraw2[i][j];
            int x1=(i-1)*(m+1)+j-1;
            int y1=(i-1)*(m+1)+j;
            krawedz[x1][y1]=kraw2[i][j];
            krawedz[y1][x1]=kraw2[i][j];
        }
    priority_queue<pair<long long,pair<int,int> > > kolejka;
    kolejka.push({0,{0,0}});
    while(!kolejka.empty())
    {
        auto para=kolejka.top();
        kolejka.pop();
        int x=para.second.first;
        if(bylo[x])
            continue;
        bylo[x]=1;
        odw[x]=-para.first;
        skad[x]=para.second.second;
        for(int i=0;i<4;i++)
        {
            int x1=d[i]+x;
            if(odw[x1] || krawedz[x].count(x1)==0)
                continue;
            kolejka.push({para.first-krawedz[x][x1],{x1,x}});
        }
    }
    for(int i=0;i<Q.size();i++)
    {
        int x1=Q[i].first;
        int y1=Q[i].second;
        int x=(x1-1)*(m+1)+y1-1;
        dodaj(x);
        obwod(x1,y1);
    }
    for(int i=0;i<=n*(m+1)+m;i++)
    {
        for(int a=0;a<4;a++)
        {
            int x=i+d[a];
            if(specjalna[i].count(x)==0 && a==0)
            {
                w[i*4+3].Q.push_back({i*4+2,0});
                w[i*4+2].Q.push_back({i*4+3,0});
            }
            if(specjalna[i].count(x)==0 && i!=0 && a==1)
            {
                w[i*4].Q.push_back({i*4+1,0});
                w[i*4+1].Q.push_back({i*4,0});
            }
            if(specjalna[i].count(x)==0 && a==2)
            {
                w[i*4+1].Q.push_back({i*4+2,0});
                w[i*4+2].Q.push_back({i*4+1,0});
            }
            if(specjalna[i].count(x)==0 && a==3)
            {
                w[i*4+3].Q.push_back({i*4,0});
                w[i*4].Q.push_back({i*4+3,0});
            }
            if(krawedz[i].count(x))
            {
                if(a==0)
                {
                    int x1=i*4+3;
                    int y1=x*4;
                    w[x1].Q.push_back({y1,krawedz[i][x]});
                    x1=i*4+2;
                    y1=x*4+1;
                    w[x1].Q.push_back({y1,krawedz[i][x]});
                }
                if(a==1)
                {
                    int x1=i*4;
                    int y1=x*4+3;
                    w[x1].Q.push_back({y1,krawedz[i][x]});
                    x1=i*4+1;
                    y1=x*4+2;
                    w[x1].Q.push_back({y1,krawedz[i][x]});
                }
                if(a==2)
                {
                    int x1=i*4+1;
                    int y1=x*4;
                    w[x1].Q.push_back({y1,krawedz[i][x]});
                    x1=i*4+2;
                    y1=x*4+3;
                    w[x1].Q.push_back({y1,krawedz[i][x]});
                }
                if(a==3)
                {
                    int x1=i*4;
                    int y1=x*4+1;
                    w[x1].Q.push_back({y1,krawedz[i][x]});
                    x1=i*4+3;
                    y1=x*4+2;
                    w[x1].Q.push_back({y1,krawedz[i][x]});
                }
            }
        }
    }
    priority_queue<pair<long long,int> > kolejka1;
    kolejka1.push({0,0});
    while(!kolejka1.empty())
    {
        auto para=kolejka1.top();
        kolejka1.pop();
        int x=para.second;
        if(w[x].bylo)
            continue;
        w[x].odw=-para.first;
        w[x].bylo=1;
        for(int i=0;i<w[x].Q.size();i++)
        {
            int pom=w[x].Q[i].first;
            if(w[pom].bylo)
                continue;
            kolejka1.push({para.first-w[x].Q[i].second,pom});
        }
    }
    cout<<w[1].odw;
    return 0;
}

Compilation message (stderr)

wall.cpp: In function 'int32_t main()':
wall.cpp:96:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |     for(int i=0;i<Q.size();i++)
      |                 ~^~~~~~~~~
wall.cpp:181:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  181 |         for(int i=0;i<w[x].Q.size();i++)
      |                     ~^~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40