제출 #918337

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
918337		Ferid20072020	Easter Eggs (info1cup17_eastereggs)	C++14	0 / 100	2 ms	508 KiB

eastereggs

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

using namespace std;

int color[513];
vector<vector<int>> g(513);
vector<int> List;

void DFS(int node){
    color[node] = 1;
    List.push_back(node);
    for(auto to : g[node]){
        if(color[to] == 0){
            DFS(to);
        }
    }
}

int findEgg (int N, vector < pair < int, int > > bridges)
{
    List.clear();
    for(int i=1 ; i<=512 ; i++){
        g[i].clear();
    }
    
    for(int i=0 ; i<bridges.size() ; i++){
        int u = bridges[i].first;
        int v = bridges[i].second;
        g[u].push_back(v);
        g[v].push_back(u);
    }

    DFS(1);


    int l = 0 , r = N - 1;
    while(l <= r){
        int mid = (l + r) / 2;
        vector<int> c;
        for(int i=l ; i<=mid ; i++){
            c.push_back(List[i]);
        }
        int ask = query(c);
        if(ask == 1){
            r = mid;
        }
        else{
            l = mid + 1;
        }
        if(c.size() == 1){
            break;
        }
    }
    return List[l];
}

컴파일 시 표준 에러 (stderr) 메시지

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:27:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i=0 ; i<bridges.size() ; i++){
      |                   ~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 40
• Subtask 2: 0 / 40
• Subtask 3: 0 / 20