Submission #579126

#	Time	Username	Problem	Language	Result	Execution time	Memory
579126		Jarif_Rahman	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	26 ms	388 KiB

eastereggs

#include "grader.h"
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

int findEgg(int n, vector<pair<int, int>> bridges){
    vector<vector<int>> v(n);
    for(auto [a, b]: bridges) a--, b--, v[a].pb(b), v[b].pb(a);

    vector<int> dfs_array;

    function<void(int, int)> dfs = [&](int nd, int ss){
        dfs_array.pb(nd+1);
        for(int x: v[nd]) if(x != ss) dfs(x, nd);
    };
    
    dfs(0, -1);

    int a = 0, b = n-1;
    while(a < b){
        int md = (a+b)/2;
        if(query(vector<int>(dfs_array.begin(), dfs_array.begin()+md+1))) b = md;
        else a = md+1;
    }

    return dfs_array[a];
}

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