제출 #1240560

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1240560		denislav	Easter Eggs (info1cup17_eastereggs)	C++20	0 / 100	1 ms	488 KiB

eastereggs

# include <iostream>
# include <vector>
# include "grader.h"
//# include "grader.cpp"
using namespace std;

const int MAX=513;

vector<int> adj[MAX];
vector<int> ord;

void dfs(int curr, int par)
{
    ord.push_back(curr);
    for(int nxt: adj[curr])
    {
        if(nxt==par) continue;
        dfs(nxt,curr);
    }
}

int findEgg (int N, vector < pair < int, int > > bridges)
{
    ord.clear();
    for(int i=1;i<=N;i++) adj[i].clear();

    for(pair<int,int> pa: bridges)
    {
        int u=pa.first,v=pa.second;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    dfs(1,0);

    int l=0,r=N-1;
    while(l!=r)
    {
        int mid=(l+r)/2;
        vector<int> v;
        for(int i=l;i<=mid;i++) v.push_back(ord[i]);
        if(query(v)) r=mid;
        else l=mid+1;
    }

    return ord[l];
}

/*
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*/

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