제출 #1235753

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1235753		mariza	Thousands Islands (IOI22_islands)	C++20	8.40 / 100	21 ms	7240 KiB

islands

#include "islands.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
const ll N=1e5;

vector<ll> g[N];
ll vis[N]={};
bool dfs(ll curr){
    // cout<<curr<<endl;
    if(vis[curr]==2) return 1;
    else if(vis[curr]==1) return 0;
    else{
        vis[curr]=2;
        bool ans=0;
        for(auto nxt:g[curr]){
            ans|=dfs(nxt);
        }
        vis[curr]=1;
        return ans;
    }
}

variant<bool, vector<int>> find_journey(int n, int m, vector<int> u, vector<int> v) {
    for(ll i=0; i<m; i+=2){
        g[u[i]].push_back(v[i]);
    }

    return dfs(0);
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 21
• Subtask 4: 8.4 / 24
• Subtask 5: 0 / 45