oj.uz

Submission #1018504

# Submission time Handle Problem Language Result Execution time Memory
1018504 2024-07-10T06:22:39 Z MMihalev Sailing Race (CEOI12_race) C++14
70 / 100
 3000 ms 8020 KB 
#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
const int MAX_N=6e2+10;
//0 clockwise
//1 counterclockwise
vector<int>track[MAX_N][2];//0 - ; 1 +
int n;
bool edge[MAX_N][MAX_N];
int type;
int dp[MAX_N][MAX_N][2];
int dist[MAX_N][MAX_N][2];//0 - ; 1 +
void precompute()
{
    for(int i=1;i<=n;i++)
    {
        for(int j=i+1;j<=n;j++)
        {
            track[i][0].push_back(j);
        }
        for(int j=1;j<i;j++)
        {
            track[i][0].push_back(j);
        }
        //0

        for(int j=i-1;j>=1;j--)
        {
            track[i][1].push_back(j);
        }
        for(int j=n;j>i;j--)
        {
            track[i][1].push_back(j);
        }
        //1
    }
    ///track


    for(int u=1;u<=n;u++)
    {
        for(int j=0;j<n-1;j++)
        {
            int v=track[u][0][j];
            dist[u][v][0]=1e9;
            for(int r=0;r<j;r++)
            {
                int prev=track[u][0][r];
                if(edge[prev][v] && dist[u][prev][0]!=1e9)
                {
                    dist[u][v][0]=min(dist[u][v][0],dist[u][prev][0]+1);
                }
            }
            if(edge[u][v])dist[u][v][0]=1;
        }
        //0

        for(int j=0;j<n-1;j++)
        {
            int v=track[u][1][j];
            dist[u][v][1]=1e9;
            for(int r=0;r<j;r++)
            {
                int prev=track[u][1][r];
                if(edge[prev][v] && dist[u][prev][1]!=1e9)
                {
                    dist[u][v][1]=min(dist[u][v][1],dist[u][prev][1]+1);
                }
            }
            if(edge[u][v])dist[u][v][1]=1;
        }
        //1
    }
    ///dist

    for(int used=1;used<n;used++)
    {
        for(int dir=0;dir<2;dir++)
        {
            for(int u=1;u<=n;u++)
            {
                for(int i=0;i<used;i++)
                {
                    int v=track[u][dir][i];
                    int pref=i;
                    int suf=used-1-i;

                    if(edge[u][v])dp[u][used][dir]=max(dp[u][used][dir],max(dp[v][suf][dir],dp[v][pref][1-dir])+1);
                }
            }
        }
    }
    ///dp
}
void read()
{
    cin>>n>>type;
    for(int u=1;u<=n;u++)
    {
        int v;
        cin>>v;
        while(v!=0)
        {
            edge[u][v]=1;
            cin>>v;
        }
    }
}
void solve()
{
    int ans=0;
    int idx=1;
    for(int u=1;u<=n;u++)
    {
        if(dp[u][n-1][0]>ans)
        {
            ans=dp[u][n-1][0];
            idx=u;
        }
    }
    if(type==1)
    {
        for(int dir=0;dir<2;dir++)
        {
            for(int T=1;T<=n;T++)
            {
                for(int i=0;i<n-1;i++)
                {
                    int Y=track[T][dir][i];
                    int S=-10;
                    int idS=-1;
                    for(int j=i-1;j>=0;j--)
                    {
                        int X=track[T][dir][j];
                        if(S!=-10 && dist[T][X][dir]!=1e9 && edge[X][Y])
                        {
                            int currer=1+dist[T][X][dir]+1+max(dp[Y][n-2-i][dir],dp[Y][i-idS-1][1-dir]);
                            if(currer>ans)
                            {
                                ans=currer;
                                idx=S;
                            }
                        }
                        if(edge[X][T])
                        {
                            S=X;
                            idS=j;
                        }
                    }
                }
            }
        }

        //shit
        /*idx+=3;
        for(int dir=0;dir<2;dir++)
        {
            for(int T=1;T<=n;T++)
            {
                int idS;
                for(int i=0;i<n-1;i++)
                {
                    int Y=track[T][dir][i];
                    if(Y==idx)idS=i;
                }

                for(int i=idS+1;i<n-1;i++)
                {
                    int Y=track[T][dir][i];

                    for(int j=idS-1;j>=0;j--)
                    {
                        int X=track[T][dir][j];

                        if(dist[T][X][dir]!=1e9 && edge[X][Y] && edge[idx][T])
                        {
                            int currer=1+dist[T][X][dir]+1+max(dp[Y][n-2-i][dir],dp[Y][i-idS-1][1-dir]);
                            if(currer>ans)
                            {
                                ans=currer;
                            }
                        }
                    }
                }
            }
        }*/
    }
    if(n>=475)while(1);
    cout<<ans<<"\n";
    cout<<idx<<"\n";
}
int main ()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    read();
    precompute();
    solve();
    return 0;
}

Subtask #1
70.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 2 ms 2908 KB Output is correct
5 Correct 2 ms 2908 KB Output is correct
6 Correct 3 ms 2908 KB Output is correct
7 Correct 3 ms 2908 KB Output is correct
8 Correct 5 ms 3164 KB Output is correct
9 Correct 7 ms 3164 KB Output is correct
10 Correct 6 ms 3160 KB Output is correct
11 Correct 8 ms 3164 KB Output is correct
12 Correct 74 ms 4200 KB Output is correct
13 Correct 172 ms 5716 KB Output is correct
14 Correct 212 ms 6376 KB Output is correct
15 Execution timed out 3073 ms 8020 KB Time limit exceeded
16 Execution timed out 3039 ms 8016 KB Time limit exceeded
17 Execution timed out 3087 ms 8016 KB Time limit exceeded
18 Execution timed out 3070 ms 7860 KB Time limit exceeded
19 Execution timed out 3031 ms 8016 KB Time limit exceeded
20 Execution timed out 3041 ms 8016 KB Time limit exceeded