Submission #722418

#	Time	Username	Problem	Language	Result	Execution time	Memory
722418		FatihSolak	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	23 ms	380 KiB

eastereggs

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

using namespace std;

int findEgg(int N, vector<pair<int,int>> bridges){
    vector<int> adj[N];
    vector<int> tin(N),seq(N);
    int t = 0;
    function<void(int,int)> dfs = [&](int v,int par){
        seq[t] = v;
        tin[v] = t++;
        for(auto u:adj[v]){
            if(u != par)
                dfs(u,v);
        }
    };
    for(int i = 0;i<N-1;++i){
        bridges[i].first--,bridges[i].second--;
        adj[bridges[i].first].push_back(bridges[i].second);
        adj[bridges[i].second].push_back(bridges[i].first);
    }
    dfs(0,-1);
    int l = 0,r = N-1;
    while(l < r){
        int m = (l + r)/2;
        vector<int> v;
        for(int i = 0;i<=m;i++){
            v.push_back(seq[i] + 1);
        }
        if(query(v)){
            r = m;
        }
        else l = m + 1;
    }
    return seq[l] + 1;
}

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