제출 #1128271

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1128271		enzy	Easter Eggs (info1cup17_eastereggs)	C++20	컴파일 에러	0 ms	0 KiB

eastereggs

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

using namespace std;
const int maxn=514;
vector<int>v[maxn];
int pre[maxn], lin[maxn], tmp;
void dfs(int u){
    tmp++;
    pre[u]=tmp;
    for(auto viz : v[u]){
        if(pre[viz]) continue;
        dfs(viz);
    }
}
bool check(int x){
    vector<int>ask;
    for(int i=1;i<=x;i++) ask.push_back(lin[i]);
    return query(ask);
}
int findEgg (int N,vector<pair<int,int>> bridges){
    for(auto p : bridges){
        v[p.first].push_back(p.second);
        v[p.second].push_back(p.first);
    }
    dfs(1);
    for(int i=1;i<=n;i++) lin[pre[i]]=i;
    int l=1, r=n;
    while(l<r){
        int mid=(l+r)/2;
        if(check(mid)) r=mid;
        else l=mid+1;
    }
    return lin[l];
}

컴파일 시 표준 에러 (stderr) 메시지

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:27:20: error: 'n' was not declared in this scope
   27 |     for(int i=1;i<=n;i++) lin[pre[i]]=i;
      |                    ^
eastereggs.cpp:28:16: error: 'n' was not declared in this scope
   28 |     int l=1, r=n;
      |                ^