제출 #974911

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
974911		AliHasanli	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	12 ms	1780 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
vector<int>dfsorder;
vector<int>g[600];
void dfs(int source,int p)
{
	dfsorder.push_back(source);
	for(int go:g[source])
        if(go!=p)dfs(go,source);
}
int findEgg (int N,vector<pair<int,int> >bridges)
{
    for(int i=1;i<=N;i++) g[i].clear();
    for(int i=0;i<N-1;i++)
    {
    	g[bridges[i].first].push_back(bridges[i].second);
    	g[bridges[i].second].push_back(bridges[i].first);
	}
	dfs(1,0);
	int l=0,r=N-2;
	int mid;
	while(l<=r)
	{
		mid=(l+r)/2;
		if(query(vector<int>(dfsorder.begin(),dfsorder.begin()+mid+1)))
			r=mid-1;
		else l=mid+1;
	}

    return dfsorder[l];
}

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