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답안 #1091427

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1091427 2024-09-20T20:22:32 Z Jovica Sailing Race (CEOI12_race) C++14
15 / 100
 3000 ms 3560 KB 
#include <bits/stdc++.h>

using namespace std;
int n,m;
vector<vector<int> > adj(501);

/// levo, desno, dali sme kaj levio element ili desnio, clockwise
bool visited[501][501][2];
int dp[501][501][2];
bool mat[501][501];

int f(int l,int r,int poz)
{

    bool t = (l==poz);
    if (visited[l][r][t]) return dp[l][r][t];

    //cout<< "l="<<l<<" r="<<r<<" poz="<<poz<<endl;
    //system("pause");
    //cout<<endl;

    int odg = 0;
    for (int sosed = l+1;sosed!=r;sosed++)
    {
        if (sosed>n) sosed = 1;
        if (r == sosed) break;
        if (mat[poz][sosed])
        {
            odg = max(f(l,sosed,sosed)+1,odg);
            odg = max(f(sosed,r,sosed)+1,odg);
        }
        else{
            odg = max(odg,f(l,sosed,l));
        }
    }

    visited[l][r][t] = true;
    dp[l][r][t] = odg;
    //if (l==7 && r==2 && t) cout<< "depeto vika "<<odg<<endl;
    return odg;
}

bool dolgvisited1[501][501];
int dolgdp1[501][501];
bool dolgvisited2[501][501];
int dolgdp2[501][501];

bool poseteno[501];
int kolku[501];
int pocetok, kraj;

int f1(int poz)
{
    if (poz == kraj) return 0;
    if (poseteno[poz]) return kolku[poz];
    int sosed = poz+1;
    int d = -10000;
    while(true)
    {
        if (sosed>n) sosed = 1;

        if (sosed==kraj)
        {
            if (mat[poz][sosed]) d = max(d,1);
            break;
        }
        if (mat[poz][sosed]) d = max(d,f1(sosed)+1);

        sosed++;
    }

    poseteno[poz] = true;
    kolku[poz] = d;
    return d;
}

int f2(int poz)
{
    if (poz == kraj) return 0;
    if (poseteno[poz]) return kolku[poz];
    int sosed = poz-1;
    int d = -10000;
    while(true)
    {
        if (sosed==0) sosed = n;

        if (sosed==kraj)
        {
            d = max(d,1);
            break;
        }
        if (mat[poz][sosed]) d = max(d,f2(sosed)+1);

        sosed--;
    }

    poseteno[poz] = true;
    kolku[poz] = d;
    return d;
}

void sredi_intervali()
{
    for (pocetok = 1;pocetok<=n;pocetok++)
        for (kraj=1;kraj<=n;kraj++)
        {
            memset(poseteno,0,sizeof(poseteno));
            dolgdp1[pocetok][kraj] = f1(pocetok);

            //cout<<"od "<<pocetok<< " do "<<kraj<<" - "<<dolgdp1[pocetok][kraj]<<endl;
        }

    for (pocetok = 1;pocetok<=n;pocetok++)
        for (kraj=1;kraj<=n;kraj++)
        {
            memset(poseteno,0,sizeof(poseteno));
            dolgdp2[pocetok][kraj] = f2(pocetok);
        }
}

int odg = 0, p = 0;
void presmetaj(int A,int B,int C,int D,bool eden)
{
    //cout<<"ulava za "<<A<<" "<<B<<" "<<C<< " "<<D<<" eden="<<eden<<endl;

    int x = 0;
    if (eden)
    {
        x= 1 + dolgdp1[B][C]+ 1;
    }
    else
    {
        x = 1 + dolgdp2[B][C] + 1;
    }
    int y = max(dp[D][A][true], dp[D][B][true]);

    x += y;

    if (x>odg)
    {
        odg = x;
        p = A;
    }
}

int main()
{
    cin>>n>>m;
    for (int i=1;i<=n;i++)
    {
        int a;
        while(true)
        {
            cin>>a;
            if (a==0) break;
            //adj[i].push_back(a);
            mat[i][a] = true;
        }
    }


    for (int i=1;i<=n;i++)
    {
        int x = f(i,i,i);
        if (x>odg)
        {
            odg = x;
            p = i;
        }
    }

    if (m==0)
    {
        cout<<odg<<endl<<p<<endl;
        return 0;
    }



    sredi_intervali();

    for (int B=1;B<=n;B++)
    {
        //cout<<"ulava u B="<<B<<endl;
        int C = B+1;
        if (C>n) C=1;
        while(C!=B)
        {
            int A = C+1;
            if (A>n) A=1;
            while(A!=B)
            {
                if (mat[A][B]==true) break;

                A++;
                if (A>n) A=1;
            }

            if (A!=B)
            {
                int D = A+1;
                if (D>n) D=1;
                while(D!=B)
                {
                    if (mat[C][D]==true)
                    {
                        presmetaj(A,B,C,D,true);
                    }
                    D++;
                    if (D>n) D=1;
                }
            }

            C++;
            if (C>n) C=1;
        }

        /// sea counter klakwajs
        C = B-1;
        if (C==0) C=n;
        while(C!=B)
        {
            int A = C-1;
            if (A==0) A=n;
            while(A!=B)
            {
                if (mat[A][B]==true) break;

                A--;
                if (A==0) A=n;
            }

            if (A!=B)
            {
                int D = A-1;
                if (D==0) D=n;
                while(D!=B)
                {
                    if (mat[C][D]==true)
                    {
                        presmetaj(A,B,C,D,false);
                    }
                    D--;
                    if (D==0) D=n;
                }
            }

            C--;
            if (C==0) C=n;
        }
    }

    cout<<odg<<endl<<p<<endl;
    return 0;
}
/*

7 1
5 0
5 0
7 0
3 0
4 0
4 3 0
2 1 0

*/

Subtask #1
15.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Incorrect 1 ms 604 KB Output isn't correct
3 Incorrect 1 ms 604 KB Output isn't correct
4 Incorrect 2 ms 860 KB Output isn't correct
5 Incorrect 1 ms 604 KB Output isn't correct
6 Incorrect 9 ms 824 KB Output isn't correct
7 Correct 3 ms 860 KB Output is correct
8 Incorrect 20 ms 1184 KB Output isn't correct
9 Incorrect 5 ms 860 KB Output isn't correct
10 Correct 8 ms 1024 KB Output is correct
11 Correct 7 ms 860 KB Output is correct
12 Incorrect 865 ms 2332 KB Output isn't correct
13 Execution timed out 3042 ms 3104 KB Time limit exceeded
14 Incorrect 258 ms 2644 KB Output isn't correct
15 Execution timed out 3055 ms 3152 KB Time limit exceeded
16 Execution timed out 3036 ms 3336 KB Time limit exceeded
17 Execution timed out 3011 ms 3152 KB Time limit exceeded
18 Incorrect 475 ms 3092 KB Output isn't correct
19 Execution timed out 3040 ms 3264 KB Time limit exceeded
20 Execution timed out 3060 ms 3560 KB Time limit exceeded