Submission #402932

#	Time	Username	Problem	Language	Result	Execution time	Memory
402932		PedroBigMan	Cave (IOI13_cave)	C++14	100 / 100	353 ms	452 KiB

cave

#include "cave.h"
/*
Author of all code: Pedro BIGMAN Dias
Last edit: 15/02/2021
*/
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimize("Ofast")
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <string>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <queue>
#include <deque>
#include <list>
#include <iomanip>
#include <stdlib.h>
#include <time.h>
#include <cstring>
using namespace std;
typedef int ll;
typedef unsigned long long int ull;
typedef long double ld;
#define REP(i,a,b) for(ll i=(ll) a; i<(ll) b; i++)
#define pb push_back
#define mp make_pair
#define pl pair<ll,ll>
#define ff first
#define ss second
#define whole(x) x.begin(),x.end()
#define DEBUG(i) cout<<"Pedro Is The Master "<<i<<endl
#define INF 500000000LL
#define EPS 0.00000001
#define pi 3.14159
ll mod=1000000007LL;

template<class A=ll> 
void Out(vector<A> a) {REP(i,0,a.size()) {cout<<a[i]<<" ";} cout<<endl;}

template<class A=ll>
void In(vector<A> &a, ll N) {A cur; REP(i,0,N) {cin>>cur; a.pb(cur);}} 

void exploreCave(int N) 
{
   	int def[N]; REP(i,0,N) {def[i]=-1;} //how the ith swith should be in order for its door to be unlocked
	int pos[N]; REP(i,0,N) {pos[i]=-1;} //switch index corresponding to door i
	int door[N]; REP(i,0,N) {door[i]=-1;} //door correspondent to switch i
	int query[N]; REP(i,0,N) {query[i]=0;} //default query
	ll val;
	REP(ind,0,N)
	{
		val = tryCombination(query);
		if(val<=ind && val!=-1) {REP(i,0,N) {if(def[i]==-1) {query[i]=1-query[i];}}}
		ll lo=0LL; ll hi=N-1;
		while(lo<hi)
		{
			ll mid = (lo+hi)/2LL;
			REP(i,lo,mid+1) {if(def[i]==-1) {query[i]=1-query[i];}}
			ll oldlo=lo; ll oldmid=mid;
			val = tryCombination(query);
			if(val<=ind && val!=-1) {hi=mid;} //door ind is located in switches [lo,mid]
			else {lo=mid+1;}
			REP(i,oldlo,oldmid+1) {if(def[i]==-1) {query[i]=1-query[i];}}
		}
		pos[ind]=lo; door[lo]=ind; def[lo]=query[lo];
	}
	answer(def,door);
	return;
}

Compilation message (stderr)

cave.cpp:6: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    6 | #pragma GCC optimization ("O3")
      | 
cave.cpp:7: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    7 | #pragma GCC optimization ("unroll-loops")
      | 
cave.cpp: In function 'void exploreCave(int)':
cave.cpp:51:6: warning: variable 'pos' set but not used [-Wunused-but-set-variable]
   51 |  int pos[N]; REP(i,0,N) {pos[i]=-1;} //switch index corresponding to door i
      |      ^~~

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24