Submission #252553

#	Time	Username	Problem	Language	Result	Execution time	Memory
252553		fivefourthreeone	Cop and Robber (BOI14_coprobber)	C++17	Compilation error	0 ms	0 KiB

coprobber

#include <bits/stdc++.h>
#define owo(i,a, b) for(int i=(a);i<(b); ++i)
#define uwu(i,a, b) for(int i=(a)-1; i>=(b); --i)
#define senpai push_back
#define ttgl pair<int, int>
#define ayaya cout<<"ayaya~"<<endl
 
using namespace std;
/*#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
gp_hash_table<int, int> mp;*/
using ll = long long;
using ld = long double;
const ll MOD = 1000000007;
int gcd(int a,int b){return b?gcd(b,a%b):a;}
ll binpow(ll a,ll b){ll res=1;while(b){if(b&1)res=(res*a)%MOD;a=(a*a)%MOD;b>>=1;}return res;}
ll modInv(ll a){return binpow(a, MOD-2);}
const double PI = acos(-1);
const double eps = -1e6;
const int INF = 0x3f3f3f3f;
const int NINF = 0xc0c0c0c0;
const ll INFLL = 0x3f3f3f3f3f3f3f3f;
const ll NINFLL = 0xc0c0c0c0c0c0c0c0;
const int mxN = 501;
int st = -1;
int adj[mxN][mxN];
int cnt[mxN];
int num[mxN][mxN];
int par[mxN][mxN];
bool state[mxN][mxN][2];
//state = [cop_pos, robber_pos]
//0 is cop's turn
//1 is robber's turn
int n;
int start(int N, bool A[mxN][mxN]) {
    n= N;
    queue<array<int, 3>> Q;
    owo(i, 0, n) {
        owo(j, 0, n) {
            adj[i][j] = A[i][j];
            cnt[i]+=adj[i][j];
        }
        state[i][i][0] = true;
        state[i][i][1] = true;
        Q.push({i, i, 0});
        Q.push({i, i, 1});
    }
    while(!Q.empty()) {
        auto p = Q.front();
        Q.pop();
        if(p[2]==0) {
            owo(i, 0, n) {
                if(adj[p[1]][i]) {
                    if(state[p[0]][i][1])continue;
                    num[p[0]][i]++;
                    if(num[p[0]][i]==cnt[i]) {
                        state[p[0]][i][1] = true;
                        Q.push({p[0], i, 1});
                    }
                }
            }
        }else {
            owo(i, 0, n) {
                if(adj[p[0]][i]||i==p[0]) {
                    if(state[i][p[1]][0])continue;
                    state[i][p[1]][0] = true;
                    par[i][p[1]] = p[0];
                    Q.push({i, p[1], 0});
                }
            }
        }
    }
    owo(i, 0, n) {
        owo(j, 0, n) {
            if(!state[i][j][0])break;
            if(j==n-1)st = i;
        }
    }
    return st;
}
int nextMove(int R) {
    return st = par[st][R];
}
/*int main() {
    int N;
    cin >> N;
    bool A[mxN][mxN];
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            cin >> A[i][j];
        }
    }
    int P = start(N,A);
    int curr = -1;
    while(st!=curr) {
        cout<<"cop: "<<st<<"\n";
        cin>>curr;
        nextMove(curr);
    }
    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;
    }
}*/

Compilation message (stderr)

/tmp/ccacxl6z.o: In function `main':
grader.cpp:(.text.startup+0x13c): undefined reference to `start(int, bool (*) [500])'
collect2: error: ld returned 1 exit status