제출 #1143865

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1143865		Irate	Easter Eggs (info1cup17_eastereggs)	C++20	컴파일 에러	0 ms	0 KiB

eastereggs

#include <bits/stdc++.h>
using namespace std;
const int mxN = 513;
vector<int>G[mxN], Euler;
void dfs(int node, int par){
    Euler.push_back(node);
    for(int &v : G[node]){
        if(v != par){
            dfs(v, node);
        }
    }
}
int query(vector<int>&q)//{
//     cout << "? ";
//     for(int i : q){
//         cout << i << " ";
//     }
//     cout << endl;
//     int a;
//     cin >> a;
//     return a;
// }
int findEgg(int n, vector<pair<int, int>>&bridges){
    for(int i = 0;i < n - 1;++i){
        int u = bridges[i].first, v = bridges[i].second;
        G[u].push_back(v);
        G[v].push_back(u);
    }
    dfs(1, 1);
    int l = 0, r = Euler.size() - 1, ans = 0;
    while(l <= r){
        int mid = (l + r) / 2;
        vector<int>q;
        for(int i = 0;i <= mid;++i){
            q.push_back(Euler[i]);
        }
        if(query(q)){
            ans = mid;
            r = mid - 1;
        }
        else{
            l = mid + 1;
        }
    }
    return Euler[ans];
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<pair<int, int>>b;
    for(int i = 0;i < n - 1;++i){
        int u, v;
        cin >> u >> v;
        b.push_back({u, v});
    }
    cout << findEgg(n, b);
}

컴파일 시 표준 에러 (stderr) 메시지

eastereggs.cpp:23:1: error: expected initializer before 'int'
   23 | int findEgg(int n, vector<pair<int, int>>&bridges){
      | ^~~
eastereggs.cpp: In function 'int main()':
eastereggs.cpp:58:13: error: 'findEgg' was not declared in this scope
   58 |     cout << findEgg(n, b);
      |             ^~~~~~~