Submission #1116802

#	Time	Username	Problem	Language	Result	Execution time	Memory
1116802		Sofiatpc	Easter Eggs (info1cup17_eastereggs)	C++14	100 / 100	20 ms	672 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"

using namespace std;

const int MAXN = 520;
vector<int> adj[MAXN], v;

void dfs(int s, int p){
    v.push_back(s);
    for(int viz : adj[s])
        if(viz != p)dfs(viz,s);
}

int findEgg (int n, vector < pair < int, int > > bridges)
{
    for(int i = 1; i <= n; i++)adj[i].clear();
    v.clear();

    for(int i = 0; i < n-1; i++){
        adj[bridges[i].first].push_back(bridges[i].second);
        adj[bridges[i].second].push_back(bridges[i].first);
    }

    dfs(1,0);

    int l = 0, r = n-1;
    while(l != r){
        int mid = (l+r)/2;

        vector<int> temp;
        for(int i = 0; i <= mid; i++)temp.push_back(v[i]);

        if(query(temp) == 1)r = mid;
        else l = mid+1;
    }

    return v[l];
}

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