Submission #1146017

#	Time	Username	Problem	Language	Result	Execution time	Memory
1146017		boropoto	Easter Eggs (info1cup17_eastereggs)	C++20	100 / 100	8 ms	524 KiB

eastereggs

#include<bits/stdc++.h>
#include"grader.h"
using namespace std;
vector<int> v[1000],tops;
int used[1000];
void DFS(int i)
{
    tops.push_back(i);
    used[i]=1;
    int sz=v[i].size(),nb;
    for(int j=0;j<sz;j++)
    {
        nb=v[i][j];
        if(used[nb]==0)
        {
            DFS(nb);
        }
    }
}
int findEgg(int n, vector < pair < int, int > > bridges)
{
    for(int i=1;i<=n;i++)
    {
        v[i].clear();
        used[i]=0;
    }
    tops.clear();

    //cout << "here" << endl;

    for(int i=0;i<n-1;i++)
    {
        //cout << bridges[i].first << " " << bridges[i].second << endl;

        v[bridges[i].first].push_back(bridges[i].second);
        v[bridges[i].second].push_back(bridges[i].first);
    }


    //cout << "here" << endl;

    DFS(1);

    //cout << "here" << endl;

    int l=0,r=n-1,m;
    vector<int> v1;
    while(l < r)
    {
        m = (l + r) / 2;
        v1.clear();
        for(int i=0;i<=m;i++)
        {
            v1.push_back(tops[i]);
        }
        if(query(v1))
        {
            r=m;
        }
        else
        {
            l=m+1;
        }
    }
    return tops[l];
}

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