Submission #744983

#	Time	Username	Problem	Language	Result	Execution time	Memory
744983		irmuun	Cop and Robber (BOI14_coprobber)	C++17	16 / 100	41 ms	1676 KiB

coprobber

#include<bits/stdc++.h>
#include "coprobber.h"

using namespace std;
 
#define pb push_back
#define ll long long
#define ff first
#define ss second
#define all(s) s.begin(),s.end()

vector<int>adj[500];
int start(int N,bool a[500][500]){
    int cnt=0;
    for(int i=0;i<N;i++){
        for(int j=0;j<N;j++){
            if(i==j) continue;
            if(a[i][j]==true){
                adj[i].pb(j);
                cnt++;
            }
        }
    }
    if(cnt!=2*(N-1)){
        return -1;
    }
    return 0;
}
vector<int>used(500),p(500);
int cur=0,f=0;
void dfs(int u){
    used[u]=1;
    for(auto v:adj[u]){
        if(used[v]==0){
            p[v]=u;
            dfs(v);
        }
    }
}
int nextMove(int r){
    if(f==0){
        dfs(0);
        f=1;
    }
    if(p[r]==cur){
        return cur;
    }
    while(p[r]!=cur){
        r=p[r];
    }
    return cur=r;
}

• Subtask 1: 16 / 16
• Subtask 2: 0 / 14
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40