제출 #279639

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
279639		MKutayBozkurt	Easter Eggs (info1cup17_eastereggs)	C++17	컴파일 에러	0 ms	0 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;

vector<vector<int>> v;
vector<int> ans;

void dfs(int i, int last = -1) {
	ans.emplace_back(i);
	for (auto node : v[i]) {
		if (last == node) continue;
		dfs(node, i);
	}
}

int findEgg(int n, vector<pair<int, int>> bridges) {
	v = vector<vector<int>>(n + 1);
	for (auto node : bridges) {
		v[node.first].emplace_back(node.second);
		v[node.second].emplace_back(node.first);
	}
	dfs(1);
	int l = 0, r = n - 1;
	while (l <= r) {
		int m = (l + r) / 2;
		if (query(vector<int>(ans.begin(), ans.begin() + mid + 1))) r = mid;
		else l = mid;
	}
	return ans[l];
}

컴파일 시 표준 에러 (stderr) 메시지

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:26:52: error: 'mid' was not declared in this scope
   26 |   if (query(vector<int>(ans.begin(), ans.begin() + mid + 1))) r = mid;
      |                                                    ^~~
eastereggs.cpp:25:7: warning: unused variable 'm' [-Wunused-variable]
   25 |   int m = (l + r) / 2;
      |       ^