Submission #732965

#	Time	Username	Problem	Language	Result	Execution time	Memory
732965		n0sk1ll	Cop and Robber (BOI14_coprobber)	C++17	Compilation error	0 ms	0 KiB

coprobber

#include <bits/stdc++.h>

#define FAST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);cerr.tie(0)
#define mp make_pair
#define xx first
#define yy second
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define all(x) x.begin(),x.end()
#define ff(i,a,b) for (int i = a; i < b; i++)
#define fff(i,a,b) for (int i = a; i <= b; i++)
#define bff(i,a,b) for (int i = b-1; i >= a; i--)
#define bfff(i,a,b) for (int i = b; i >= a; i--)

using namespace std;
long double typedef ld;
unsigned int typedef ui;
long long int typedef li;
pair<int,int> typedef pii;
pair<li,li> typedef pli;
pair<ld,ld> typedef pld;
vector<vector<int>> typedef graph;
unsigned long long int typedef ull;
//const int mod = 998244353;
const int mod = 1000000007;







//Note to self: Check for overflow

int dje[503][503]; //ako policajac na potezu pobedjuje, gde treba ici?
int zauz[503][503][2]; //<0 ako smo vec izracunali xd
bool dp[503][503][2]; //canwin
//0 - pandur na potezu
//1 - crook na potezu

graph g(505);

int P;

int start(int n, bool A[500][500])
{
    ff(i,0,n) ff(j,i+1,n) if (A[i][j]) g[i].pb(j),g[j].pb(i);

    queue<pair<pii,pii>> bfs;
    ff(i,0,n) bfs.push({{i,i},{0,-1}}),bfs.push({{i,i},{1,-1}});

    //ovo vazi samo kad je lopov na potezu
    ff(i,0,n) ff(j,0,n) zauz[i][j][1]+=(int)g[j].size();
    ff(i,0,n) ff(j,0,n) zauz[i][j][0]=mod;

    while (!bfs.empty())
    {
        int p=bfs.front().xx.xx;
        int l=bfs.front().xx.yy;
        bool ko=bfs.front().yy.xx;
        int okle=bfs.front().yy.yy;
        bfs.pop();

        if (zauz[p][l][ko]<0) continue;

        zauz[p][l][ko]=-1;
        dp[p][l][ko]=true;
        if (ko==0) dje[p][l]=okle;

        if (ko) //crook na trenutnom potezu
        {
            //znaci policajac je bio na proslom
            bfs.push({{p,l},{0,p}});
            for (auto pugde : g[p])
                bfs.push({{pugde,l},{0,p}});

        }
        else //policajac na potezu
        {
            //znaci crook je bio na proslom
            for (auto lugde : g[l])
            {
                zauz[p][lugde][1]--;
                if (zauz[p][lugde][1]==0)
                    bfs.push({{p,lugde},{1,-1}});
            }
        }
    }

    /*cout<<"policajac:"<<endl;
    ff(i,0,n)
    {
        ff(j,0,n) cout<<dp[i][j][0]<<" ";
        cout<<endl;
    } cout<<endl;

    cout<<"lopov:"<<endl;
    ff(i,0,n)
    {
        ff(j,0,n) cout<<dp[i][j][1]<<" ";
        cout<<endl;
    } cout<<endl;

    cout<<"jebem ti kurac:"<<endl;
    ff(i,0,n)
    {
        ff(j,0,n) cout<<dje[i][j]<<" ";
        cout<<endl;
    } cout<<endl;
    cout<<endl;*/

    ff(i,0,n)
    {
        bool moze=true;
        ff(j,0,n) if (!dp[i][j][0]) moze=false;
        if (moze) return P=i,i;
    }

    return -1;
}

int nextMove(int R)
{
    return P=dje[P][R],P;
}





/// don't modify the main function
int main() {
    #define MAX_N 500

    int N;
    cin >> N;
    bool A[MAX_N][MAX_N];
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            cin >> A[i][j];
        }
    }
    int P = start(N,A);
    cout << P << endl;
    int R;
    cin >> R;
    while (true) {
        if (P == R) break;
        P = nextMove(R);
        cout << P << endl;
        if (P == R) break;
        cin >> R;
    }
}

//Note to self: Check for overflow

Compilation message (stderr)

/usr/bin/ld: /tmp/ccmCl2F2.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccx9yfl3.o:coprobber.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status