제출 #389481

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
389481		abc864197532	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	32 ms	368 KiB

eastereggs

#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define test(x) cout << #x << ' ' << x << endl
#define printv(x) { \
    for (auto a : x) cout << a << ' '; \
    cout << endl; \
}
#define pii pair<int, int>
#define pll pair<lli, lli>
#define X first
#define Y second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
const int N = 513, abc = 864197532;

int query(vector <int> islands);

int findEgg(int n, vector <pii> bridges) {
    vector <vector <int>> adj(n + 1);
    for (pii i : bridges) {
        adj[i.X].pb(i.Y);
        adj[i.Y].pb(i.X);
    }
    vector <bool> dead(n + 1, false);
    dead[0] = true;
    while (count(all(dead), false) > 1) {
        int cursz = count(all(dead), false);
        vector <int> cur;
        vector <bool> in(n + 1, false);
        int not_dead_cnt = 0;
        function<void(int, int)> dfs = [&](int v, int pa) {
            if (not_dead_cnt < cursz / 2) cur.pb(v), not_dead_cnt += !dead[v], in[v] = true;
            for (int u : adj[v]) if (u != pa) {
                dfs(u, v);
            }
        };
        dfs(1, -1);
        assert(not_dead_cnt == cursz / 2);
        int ans = query(cur);
        for (int i = 1; i <= n; ++i) if (!dead[i] && in[i] != ans) {
            dead[i] = true;
        }
    }
    for (int i = 1; i <= n; ++i) if (!dead[i]) {
        return i;
    }
}

컴파일 시 표준 에러 (stderr) 메시지

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:23:36: warning: control reaches end of non-void function [-Wreturn-type]
   23 |     vector <vector <int>> adj(n + 1);
      |                                    ^

• Subtask 1: 40 / 40
• Subtask 2: 40 / 40
• Subtask 3: 20 / 20