Submission #1084586

#	Time	Username	Problem	Language	Result	Execution time	Memory
1084586		SamueleVid	Thousands Islands (IOI22_islands)	C++17	0 / 100	1153 ms	1579776 KiB

islands

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

constexpr int MAXN = 1e5 + 5;
vector<int> adj[MAXN];
bool v[MAXN];

bool ciclo = 0;

int dfs(int u, int p) {
    if (v[u]) ciclo = 1;
    v[u] = 1;

    bool tolto_p = 0;
    for (auto x : adj[u]) {
        if (x == p && !tolto_p) {
            tolto_p = 1;
            continue;
        }
        dfs(x, u);
    }
}   

variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) {
    fill(v, v + MAXN, 0);
    for (int i = 0; i < M; i ++) {
        adj[U[i]].push_back(V[i]);
    }

    dfs(0, -1);
    return ciclo;
}

Compilation message (stderr)

islands.cpp: In function 'int dfs(int, int)':
islands.cpp:22:1: warning: no return statement in function returning non-void [-Wreturn-type]
   22 | }
      | ^

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