제출 #243023

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
243023		Joky	Easter Eggs (info1cup17_eastereggs)	C++14	0 / 100	9 ms	5248 KiB

eastereggs

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

using namespace std;
typedef long long ll ;
const ll mk = 100005;

#define endl "\n"
#define IOS  ios::sync_with_stdio(0); cin.tie(0);
#define mp make_pair
#define fi first
#define se second
#define pii pair<int,int>
 
vector <int> g[mk] ,now_ ,cur_set;
 
int mx_size;
void dfs(int u ,int p=-1){
    if(!mx_size)
        return;
    cur_set.push_back(u);
    if(find(now_.begin() ,now_.end() ,u) != now_.end())
        mx_size--;
    for(int i = 0 ; i < g[u].size(); i++) {
        int v = g[u][i];
	    if(v != p)  dfs(v ,u);
    }
}
vector <int> findSet(int sz){
    mx_size = sz;
    cur_set.clear();
    dfs(1);
    return cur_set;
}
 
int findEgg (int N, vector < pair < int, int > > bridges){
    now_.clear();
    for(int i=0; i<=mk; i++)
        g[i].clear();
    for(int i = 0 ; i < N - 1; i++) {
    	g[bridges[i].fi].push_back(bridges[i].se);
    	g[bridges[i].se].push_back(bridges[i].fi);
	}
 
    now_.resize(N);
    iota(now_.begin() ,now_.end() ,1);
 
    while(now_.size() > 1){
        vector <int> visit = findSet(((int)now_.size())/2); // divide the previous size
        if(query(visit)){
            vector <int> nv;
            for(int i = 0 ; i < visit.size(); i++ )
            {
            	int v = visit[i];
			    if(find(now_.begin() ,now_.end() ,v) != now_.end())
                {
			        nv.push_back(v);      // all those nodes in the previous subset
			    }
			}
            now_ = nv;   
        }
		else{
            for(int i =0; i <  visit.size() ; i++) 
            {
            	int v = visit[i];
                if(find(now_.begin() ,now_.end() ,v) != now_.end())
                {
				    now_.erase(find(now_.begin() ,now_.end() ,v));
				}
            }
        }
    }
 
    return now_.front();
} 

컴파일 시 표준 에러 (stderr) 메시지

eastereggs.cpp: In function 'void dfs(int, int)':
eastereggs.cpp:24:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0 ; i < g[u].size(); i++) {
                     ~~^~~~~~~~~~~~~
eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int i = 0 ; i < visit.size(); i++ )
                             ~~^~~~~~~~~~~~~~
eastereggs.cpp:63:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int i =0; i <  visit.size() ; i++) 
                           ~~^~~~~~~~~~~~~~~

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