Submission #410447

#	Time	Username	Problem	Language	Result	Execution time	Memory
410447		nichke	Easter Eggs (info1cup17_eastereggs)	C++14	0 / 100	2 ms	456 KiB

eastereggs

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

vector< int > vi;
vector< int > euler;
vector< int > adj[513];

bool query(vector <int> );

void dfs(int v, int p = -1) {
	euler.push_back(v);
	for (int u : adj[v]) {
		if (u == p) continue;
		dfs(u, v);
	}
}

bool check_query(int x) {
	vi.clear();
	for (int i = 0; i <= x; i++) {
		vi.push_back(i);
	}
	return query(vi);   
}

int findEgg(int N, vector< pair <int, int> > bridges) {
	euler.clear();
	for (int i = 1; i <= N; i++) {
		adj[i].clear();
	}
	for (int i = 0; i < N - 1; i++) {
		adj[bridges[i].first].push_back(bridges[i].second);
		adj[bridges[i].second].push_back(bridges[i].first);
	}
	dfs(1);
	int res = -1;
	int l = 0, r = euler.size() - 1;
	while (l <= r) {
		int m = (l + r) / 2;
		if (check_query(m)) {
			r = m - 1;
			res = m;
		} else {
			l = m + 1;
		}
	}
	return euler[res];
}

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