oj.uz

Submission #1018505

# Submission time Handle Problem Language Result Execution time Memory
1018505 2024-07-10T06:23:15 Z MMihalev Sailing Race (CEOI12_race) C++14
70 / 100
 3000 ms 8024 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>=490)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 344 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 1 ms 2908 KB Output is correct
5 Correct 2 ms 2908 KB Output is correct
6 Correct 3 ms 2904 KB Output is correct
7 Correct 3 ms 3164 KB Output is correct
8 Correct 6 ms 3216 KB Output is correct
9 Correct 6 ms 3164 KB Output is correct
10 Correct 5 ms 3164 KB Output is correct
11 Correct 8 ms 3148 KB Output is correct
12 Correct 65 ms 4184 KB Output is correct
13 Correct 169 ms 5460 KB Output is correct
14 Correct 210 ms 6372 KB Output is correct
15 Execution timed out 3034 ms 8020 KB Time limit exceeded
16 Execution timed out 3021 ms 7840 KB Time limit exceeded
17 Execution timed out 3014 ms 8016 KB Time limit exceeded
18 Execution timed out 3062 ms 7840 KB Time limit exceeded
19 Execution timed out 3058 ms 8024 KB Time limit exceeded
20 Execution timed out 3036 ms 8024 KB Time limit exceeded