Submission #1095275

#	Time	Username	Problem	Language	Result	Execution time	Memory
1095275		idiotcomputer	Easter Eggs (info1cup17_eastereggs)	C++11	0 / 100	1 ms	852 KiB

eastereggs

#include "grader.h"
#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define pb push_back
#define sz(x) (int) (x).size()

const int mxN = 520;
vector<int> adj[mxN];
vector<int> ord;
/*int res = 0;
int k;

bool query(vector<int> cur){
	res++;
	for (int c : cur) if (c == k) return 1;
	return 0;
}*/

void dfs(int node, int p){
	ord.pb(node);
	for (int c : adj[node]){
		if (c != p) dfs(c,node);
	}
}

int findEgg(int N, vector<pair<int,int>> bridges){
	for (int i = 0; i < N; i++) adj[i].clear();
	ord.clear();
	for (pair<int,int> c : bridges){
		adj[c.f-1].pb(c.s-1);
		adj[c.s-1].pb(c.f-1);
	}/*
	for (int i = 0; i < N-1; i++){
		adj[bridges[i].f-1].pb(bridges[i].s-1);
		adj[bridges[i].s-1].pb(bridges[i].f-1);
	}*/
	dfs(0,-1);
	int l = -1;
	int r = N-1;
	int cur;
	while (r-l>1){
		cur = (l+r)/2;
		if (query(vector<int>(ord.begin(),ord.begin()+cur+1))) r = cur;
		else l = cur;
	}	
	//return 0;
	return ord[r]+1;
}	

/*
int main() {
	//ios_base::sync_with_stdio(false);
	//cin.tie(NULL);

	int n;
	cin >> n >> k;
	k--;

	vector<pair<int,int>> b(n-1);
	for (int i = 0; i < n-1; i++) cin >> b[i].f >> b[i].s;
	
	cout << findEgg(n,b)+1 << " " << res << '\n';
	return 0;
}
*/

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