Submission #1228697

#	Time	Username	Problem	Language	Result	Execution time	Memory
1228697		atillama	Easter Eggs (info1cup17_eastereggs)	C++20	40 / 100	8 ms	508 KiB

eastereggs

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

using namespace std;

#define pb push_back

vector<int> adj[512 + 5];
vector<int> x;

void dfs(int node, int par){
	x.pb(node);
	for(int to : adj[node]){
		if(to != par){
			dfs(to, node);
		}
	}
}

int findEgg (int N, vector < pair < int, int > > bridges)
{
	for(int i = 1; i <= N; i++){
		adj[i].clear();
	}
	x.clear();
	for(auto i : bridges){
		adj[i.first].pb(i.second);
		adj[i.second].pb(i.first);
	}
	dfs(1, 0);
	int best = N;
    int l = 1, r = N;
	while(l <= r){
		int mid = (l + r) / 2;
		bool b = query(vector<int>(x.begin(), x.begin() + mid));
		if(b){
			r = mid - 1;
		}else{
			best = mid;
			l = mid + 1;
		}
	}
	return x[best + 1 - 1];
}

• Subtask 1: 0 / 40
• Subtask 2: 40 / 40
• Subtask 3: 0 / 20