Submission #1146217

#	Time	Username	Problem	Language	Result	Execution time	Memory
1146217		rado15	Easter Eggs (info1cup17_eastereggs)	C++20	100 / 100	8 ms	504 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
#define endl '\n'
#define ll long long int

using namespace std;
const int maxn =  600;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}

vector<int> v[maxn];
bool used[maxn];
vector<int> topo;

void DFS(int beg)
{
    used[beg] = true;
    topo.push_back(beg);
    for(auto &nb: v[beg])
    {
        if(!used[nb])
        {
            DFS(nb);
        }
    }
}

int findEgg(int n, vector<pair<int, int>> bridges)
{
    memset(used, false, sizeof(used));
    for(int i = 1; i <= n; i++)
    {
        v[i].clear();
    }
    for(int i = 0; i < bridges.size(); i++)
    {
        int x, y;
        x = bridges[i].first;
        y = bridges[i].second;
        v[x].push_back(y);
        v[y].push_back(x);
    }
    topo.clear();
    DFS(1);
    int l = 0, r = topo.size()-1, mid;
    vector<int> curr;
    while(l < r)
    {
        mid = l + (r - l)/2;
        curr.clear();
        for(int i = 0; i <= mid; i++)
        {
            curr.push_back(topo[i]);
        }
        int q = query(curr);
        if(q == 1)
        {
            r = mid;
        }
        else l = mid + 1;

    }
    return topo[l];
}

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