제출 #565898

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
565898		groshi	Easter Eggs (info1cup17_eastereggs)	C++17	0 / 100	13 ms	1864 KiB

eastereggs

#include<iostream>
#include<vector>
#include<utility>
#include "grader.h"
using namespace std;
struct wi{
    vector<int> Q;
    int odw=0;
    int dol=0;
}*w;
int egg=-1;
int ile=0;
/*bool query(vector<int> Q)
{
    //cout<<"pytam sie\n";
    for(int i=0;i<Q.size();i++)
        cout<<Q[i]<<" ";
    int k;
    cin>>k;
    return k;
}*/
void dfs(int x,int ojc)
{
    ile++;
    w[x].dol=0;
    for(int i=0;i<w[x].Q.size();i++)
    {
        int pom=w[x].Q[i];
        if(pom==ojc || w[pom].odw==1)///uwazac z odw
            continue;
        dfs(pom,x);
        w[x].dol+=w[pom].dol;
    }
    w[x].dol++;
}
vector<int> zapytaj;
void dodaj(int x,int ojc)
{
    zapytaj.push_back(x);
    for(int i=0;i<w[x].Q.size();i++)
    {
        int pom=w[x].Q[i];
        if(pom==ojc || w[pom].odw==1)
            continue;
        dodaj(pom,x);
    }
}
void odznacz1(int x,int ojc)
{
    w[x].odw=1;
    for(int i=0;i<w[x].Q.size();i++)
    {
        int pom=w[x].Q[i];
        if(w[pom].odw==1 || pom==ojc)
            continue;
        odznacz1(pom,x);
    }
}
void odznacz2(int x,int ojc,int co)
{
    w[x].odw=1;
    for(int i=0;i<w[x].Q.size();i++)
    {
        int pom=w[x].Q[i];
        if(w[pom].odw==1 || pom==ojc || pom==co)
            continue;
        odznacz2(pom,x,co);
    }
}
void szukaj(int x)
{
    ile=0;
    dfs(x,0);
    if(ile==1)
    {
        egg=x;
        return;
    }
    int gdzie=x;
    int ojc=0;
    while(true)
    {
        //cout<<gdzie<<" "<<ojc<<"\n";
        int k=0;
        for(int i=0;i<w[gdzie].Q.size();i++)
        {
            int pom=w[gdzie].Q[i];
            if(pom==ojc || w[pom].odw==1)//uwazac z odw
                continue;
            if(w[pom].dol>=ile/2)
            {
                k=1;
                ojc=gdzie;
                gdzie=pom;
                break;
            }
        }
        if(k==1)
            continue;
        break;
    }
    zapytaj.clear();
    dodaj(gdzie,ojc);
    int k=query(zapytaj);
    if(k==0)
    {
        odznacz1(gdzie,ojc);
        szukaj(x);
    }
    else{
        odznacz2(x,0,gdzie);
        szukaj(gdzie);
    }
}
int findEgg(int n,vector<pair<int,int> > bridges)
{
    w=new wi[n+3];
    egg=-1;
    for(int i=0;i<bridges.size();i++)
    {
        int x=bridges[i].first;
        int y=bridges[i].second;
        w[x].Q.push_back(y);
        w[y].Q.push_back(x);
    }
    szukaj(1);
    return egg;
}

컴파일 시 표준 에러 (stderr) 메시지

eastereggs.cpp: In function 'void dfs(int, int)':
eastereggs.cpp:26:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(int i=0;i<w[x].Q.size();i++)
      |                 ~^~~~~~~~~~~~~~
eastereggs.cpp: In function 'void dodaj(int, int)':
eastereggs.cpp:40:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for(int i=0;i<w[x].Q.size();i++)
      |                 ~^~~~~~~~~~~~~~
eastereggs.cpp: In function 'void odznacz1(int, int)':
eastereggs.cpp:51:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for(int i=0;i<w[x].Q.size();i++)
      |                 ~^~~~~~~~~~~~~~
eastereggs.cpp: In function 'void odznacz2(int, int, int)':
eastereggs.cpp:62:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for(int i=0;i<w[x].Q.size();i++)
      |                 ~^~~~~~~~~~~~~~
eastereggs.cpp: In function 'void szukaj(int)':
eastereggs.cpp:85:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |         for(int i=0;i<w[gdzie].Q.size();i++)
      |                     ~^~~~~~~~~~~~~~~~~~
eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:119:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  119 |     for(int i=0;i<bridges.size();i++)
      |                 ~^~~~~~~~~~~~~~~

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