제출 #918220

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
918220		vjudge1	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	15 ms	988 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
int cnt=0;
vector<vector<int>> g;
vector<int> a;
void dfs(int v,int prev){
	a.push_back(v);
	for(auto x:g[v]){
		if(x==prev){
			continue;
		}
		dfs(x,v);
	}
}
int findEgg (int N, vector < pair < int, int > > bridges)
{
	g.clear();
	a.clear();
	g.resize(N+1);
	for(auto x:bridges){
		g[x.first].push_back(x.second); 
		g[x.second].push_back(x.first);
	}
	dfs(1,-1);
	int l=1,r=N; 
	while(l<r){
		int mid=(l+r)/2; 
		vector<int> b;
		for(int i=0;i<mid;i++){
			b.push_back(a[i]);
		}
		if(query(b)){
			r=mid; 
		}
		else{
			l=mid+1;
		}
	}
    return a[r-1];
}

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