Submission #565917

#	Time	Username	Problem	Language	Result	Execution time	Memory
565917		groshi	Easter Eggs (info1cup17_eastereggs)	C++17	0 / 100	3 ms	720 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;
vector<int> lista;
/*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)
{
    lista.push_back(x);
    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)
            continue;
        dfs(pom,x);
    }
}
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);
    }
    dfs(1,0);
    //for(int i=0;i<lista.size();i++)
        //cout<<lista[i]<<" ";
    int pocz=0,kon=lista.size()+1,sre,ostd;
    while(pocz<kon)
    {
        sre=(pocz+kon)/2;
        vector<int> zapytaj;
        for(int i=0;i<sre;i++)
            zapytaj.push_back(lista[i]);
        int k=query(zapytaj);
        if(k==1)
        {
            ostd=sre-1;
            kon=sre;
        }
        else pocz=sre+1;
    }
    return lista[ostd];
}

Compilation message (stderr)

eastereggs.cpp: In function 'void dfs(int, int)':
eastereggs.cpp:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i=0;i<w[x].Q.size();i++)
      |                 ~^~~~~~~~~~~~~~
eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:39:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for(int i=0;i<bridges.size();i++)
      |                 ~^~~~~~~~~~~~~~~
eastereggs.cpp:64:22: warning: 'ostd' may be used uninitialized in this function [-Wmaybe-uninitialized]
   64 |     return lista[ostd];
      |                      ^

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