제출 #384469

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
384469		ak2006	Easter Eggs (info1cup17_eastereggs)	C++14	0 / 100	2 ms	492 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
#define pb push_back
using vi = vector<int>;
using vvi = vector<vi>;
vvi adj(513);
vi a;
void dfs(int i,int p)
{
    a.pb(i);
    for (int c:adj[i]){
        if (c == p)continue;
        dfs(c,i);
    }
}
int findEgg(int n,vector<pair<int,int>>b)
{
    for (int i = 0;i<=512;i++)adj[i].clear();
    a.clear();
    for (int i = 0;i<n - 1;i++)adj[b[i].first].pb(b[i].second);
    dfs(1,1);
    int l = 0,r = n - 1,ans = 0;
    while (l <= r){
        int mid = (l + r)/2;
        if (query(vector<int>(a.begin(),a.begin() + mid))){
            r = mid - 1;
        }
        else l = mid + 1,ans = mid;
    }
    return a[ans];
}

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