Submission #687467

#	Time	Username	Problem	Language	Result	Execution time	Memory
687467		heeheeheehaaw	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	21 ms	488 KiB

eastereggs

#include <iostream>
#include <vector>
#include "grader.h"

using namespace std;

vector<int> qv;
vector<int> muc[512 + 5];
bool visited[512 + 5];
int q[512 + 5], order[512 + 5], cnt = 0;

/*int query(vector<int> marog)
{
    for(int i = 0; i < marog.size(); i++)
        cout<<marog[i]<<" ";
    cout<<'\n';
    int cv;
    cin>>cv;
    return cv;
}*/

void reseteaza()
{
    for(int i = 1; i <= 512; i++)
    {
        muc[i].clear();
        q[i] = 0;
        order[i] = 0;
        cnt = 0;
        visited[i] = false;
    }
    qv.clear();

}

void bfs()
{
    int st = 1, dr = 1;
    q[1] = 1, visited[1] = true;
    while(st <= dr)
    {
        int nod = q[st];
        st++, cnt++;
        order[cnt] = nod;
        for(auto it: muc[nod])
            if(!visited[it])
            {
                dr++, q[dr] = it;
                visited[it] = true;
            }
    }
    return;
}

int findEgg(int N, vector<pair<int, int>> bridges)
{
    reseteaza();
    for(auto it: bridges)
    {
        muc[it.first].push_back(it.second);
        muc[it.second].push_back(it.first);
    }
    bfs();
    int st = 1, dr = cnt;
    while(st <= dr)
    {
        int mij = (st + dr) / 2;
        if(st == dr)
            return order[st];
        qv.clear();
        for(int i = 1; i <= mij; i++)
            qv.push_back(order[i]);
        int val = query(qv);
        if(val == 1)
            dr = mij;
        else
            st = mij + 1;
    }
    return order[st];
}

vector<pair<int, int>> brid;
/*
int main()
{
    int n;
    cin>>n;
    for(int i = 1; i < n; i++)
    {
        int a, b;
        cin>>a>>b;
        brid.push_back({a, b});
    }

    cout<<findEgg(n, brid)<<'\n';

    return 0;
}*/

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