Submission #764278

#	Time	Username	Problem	Language	Result	Execution time	Memory
764278		raysh07	Thousands Islands (IOI22_islands)	C++17	1.75 / 100	24 ms	6612 KiB

islands

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

const int N = 1e5 + 69;
int deg[N];
bool vis[N];
vector <int> adj[N];
int n;

int dfs(int u){
    vis[u] = true;
    int found = -1;
    if (deg[u] >= 2) found = u;
    for (int v : adj[u]){
        if (!vis[v]){
            found = max(found, dfs(v));
        }
    }
    
    return found;
}

variant<bool, vector<int>> find_journey(int nn, int m, vector<int> u, vector<int> v) {
    n = nn;
    for (int i = 0; i < m; i+=2){
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
        deg[u[i]]++;
        deg[v[i]]++;
    }
    
    int found = dfs(0);
    if (found == -1) return false;
    else return true;
}

• Subtask 1: 0 / 5
• Subtask 2: 1.75 / 5
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 45