Submission #330460

#	Time	Username	Problem	Language	Result	Execution time	Memory
330460		Falcon	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	28 ms	492 KiB

eastereggs

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

using namespace std;

int findEgg (int N, vector<pair<int, int>> bridges) {

    vector<vector<int>> adj(N + 1);
    for(const auto& [u, v] : bridges)
        adj[u].push_back(v), adj[v].push_back(u);

    vector<bool> vis(N + 1);
    vector<int> order{1}; order.reserve(N);
    for(int i = 0; i < int(order.size()); ++i) {
        int u{order[i]}; vis[u] = true;
        for(int v : adj[u])
            if(!vis[v]) order.push_back(v);
    }

    assert(order.size() == N);

    int i{};
    for(int t = 1 << __lg(N); t > 0; t >>= 1)
        if(i + t < N
           && !query(vector<int>(order.begin(), order.begin() + i + t)))
            i += t;
    
    return order[i];
}

Compilation message (stderr)

In file included from /usr/include/c++/9/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:33,
                 from grader.h:1,
                 from eastereggs.cpp:2:
eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:20:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |     assert(order.size() == N);
      |            ~~~~~~~~~~~~~^~~~

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