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답안 #484223

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
484223 2021-11-02T14:33:25 Z Alexandruabcde Easter Eggs (info1cup17_eastereggs) C++14
100 / 100
 20 ms 468 KB 
#include <bits/stdc++.h>
#include "grader.h"

using namespace std;

constexpr int NMAX = 1000;

vector <int> G[NMAX];

vector <int> vec;

void Parcurgere_Euler (int Node, int Dad = -1) {
    vec.push_back(Node);

    for (auto it : G[Node]) {
        if (it == Dad) continue;

        Parcurgere_Euler(it, Node);
    }
}

bool Check (int Right) {
    vector <int> ask;
    for (int i = 0; i <= Right; ++ i )
        ask.push_back(vec[i]);

    return query(ask);
}

int findEgg (int N, vector < pair < int, int > > bridges)
{
    vec.clear();
    for (int i = 1; i <= N; ++ i )
        G[i].clear();
    for (int i = 0; i < bridges.size(); ++ i ) {
        int x = bridges[i].first;
        int y = bridges[i].second;

        G[x].push_back(y);
        G[y].push_back(x);
    }

    Parcurgere_Euler(1, -1);

    int st = 0, dr = vec.size()-2;
    int ans = vec.size()-1;

    while (st <= dr) {
        int mij = (st + dr) / 2;

        if (Check(mij)) {
            dr = mij - 1;
            ans = mij;
        }
        else st = mij + 1;
    }

    return vec[ans];
}

Compilation message

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:35:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     for (int i = 0; i < bridges.size(); ++ i ) {
      |                     ~~^~~~~~~~~~~~~~~~

Subtask #1
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 200 KB Number of queries: 4
2 Correct 1 ms 200 KB Number of queries: 4
3 Correct 1 ms 200 KB Number of queries: 4
4 Correct 1 ms 200 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 348 KB Number of queries: 8
2 Correct 11 ms 344 KB Number of queries: 9
3 Correct 15 ms 468 KB Number of queries: 9
4 Correct 19 ms 364 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 372 KB Number of queries: 9
2 Correct 14 ms 352 KB Number of queries: 9
3 Correct 15 ms 328 KB Number of queries: 9
4 Correct 20 ms 328 KB Number of queries: 9