Submission #585869

#	Time	Username	Problem	Language	Result	Execution time	Memory
585869		MilosMilutinovic	Easter Eggs (info1cup17_eastereggs)	C++14	100 / 100	19 ms	368 KiB

eastereggs

#include "grader.h"
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <ctime>
#include <cassert>
#include <complex>
#include <string>
#include <cstring>
#include <chrono>
#include <random>
#include <bitset>
#include <array>
using namespace std;
 
#ifdef LOCAL
	#define eprintf(...) {fprintf(stderr, __VA_ARGS__);fflush(stderr);}
#else
	#define eprintf(...) 42
#endif
 
using ll = long long;
using ld = long double;
using uint = unsigned int;
using ull = unsigned long long;
template<typename T>
using pair2 = pair<T, T>;
using pii = pair<int, int>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll myRand(ll B) {
	return (ull)rng() % B;
}
 
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
 
clock_t startTime;
double getCurrentTime() {
	return (double)(clock() - startTime) / CLOCKS_PER_SEC;
}
 
const int N = 515;
vector<int> g[N];
vector<int> ord;
 
void AddEdge(int v, int u) {
	g[v].push_back(u);
	g[u].push_back(v);
}
 
void dfs(int v, int par) {
	ord.push_back(v);
	for (int u : g[v]) if (u != par) dfs(u, v);
}
 
int Ask(int x) {
	vector<int> qv;
	for (int i = 0; i <= x; i++)
		qv.push_back(ord[i]);
	return query(qv);
}
 
int findEgg(int n, vector<pii> bridges) {
  	for (int i = 1; i <= n; i++) g[i].clear();
	for (int i = 0; i < n - 1; i++) {
		AddEdge(bridges[i].fi, bridges[i].se);
	}
	ord.clear();
	dfs(1, 0);
	int l = 0, r = n - 1;
	while (l < r) {
		int mid = (l + r) >> 1;
		if (Ask(mid))
			r = mid;
		else
			l = mid + 1;
	}
	return ord[l];
}

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