Java, $ 804.991
Il punteggio è di 1001 round. Probabilmente è troppo vicino per chiamare tra questa risposta e quella di Stephan Schinkel .
Questo si basa sulla mia risposta nella sfida precedente, in quanto utilizza lo stesso calcolo basato sull'entropia per stimare i profitti. La differenza principale è che ora prende semplicemente buste in coppia (1 e 2, quindi 3 e 4, ecc.) E osserva le possibili combinazioni di take-take, take-pass, pass-take, ecc. punteggio esatto stimato quando il numero di buste valide è veramente ridotto.
Il "wrapper" che ho scritto non è in realtà un vero wrapper, ma dà solo buste a coppie invece di chiamare una Oracle(1)
funzione ogni altro round.
Nel complesso, direi che, nonostante la maggiore complessità, questo bot non è davvero migliore del mio precedente.
Giocatore
import java.lang.Math;
public class Player2
{
public int[] V;
public Player2(int s)
{
V = new int[s];
for(int i = 0; i<V.length; i++)
{
V[i] = i+1;
}
////System.out.println();
}
public boolean [] takeQ(int x, int y)
{
//System.out.println("Look: " + x + " " + y);
boolean [] move = new boolean[]{false,false};
double max = 0;
double val = 0;
int[] nextV = V;
////System.out.println("look " + x);
int i = find(V,x);
if(i >= 0) //if found
{
//try taking first envelope
int[] newVt = takeSlice(V,i);
//System.out.println(" T: " + ats(newVt));
int j = find(newVt,y);
if(j >= 0)
{
//try taking first and second
int[] newVtt = takeSlice(newVt,j);
val = x + y + calcVal(newVtt);
//System.out.println(" TT: " + ats(newVtt) + " " + val);
if(val > max)
{
move = new boolean[]{true,true};
max = val;
nextV = newVtt;
}
}
//try taking first and passing second
int[] newVtp = passSlice(newVt,j);
val = x + calcVal(newVtp);
//System.out.println(" TP: " + ats(newVtp) + " " + val);
if(val > max)
{
move = new boolean[]{true,false};
max = val;
nextV = newVtp;
}
}
int[] newVp = passSlice(V,i);
//System.out.println(" V: " + ats(V));
//System.out.println(" P: " + ats(newVp));
int j = find(newVp,y);
if(j >= 0)
{
//try passing first and taking second
int[] newVpt = takeSlice(newVp,j);
val = y + calcVal(newVpt);
//System.out.println(" PT: " + ats(newVpt) + " " + val);
if(val > max)
{
move = new boolean[]{false,true};
max = val;
nextV = newVpt;
}
}
//try taking first and passing second
int[] newVpp = passSlice(newVp,j);
val = calcVal(newVpp);
//System.out.println(" PP: " + ats(newVpp) + " " + val);
if(val > max)
{
move = new boolean[]{false,false};
max = val;
nextV = newVpp;
}
V = nextV;
//System.out.println(" NEW: " + ats(V));
return move;
}
public static String ats(int [] a)
{
String s = "";
for(int i = 0; i < a.length; i++)
{
s += a[i] + ",";
}
return s;
}
public static int[] takeSlice (int[] list, int loc)
{
int [] newlist = new int[list.length - loc - 1];
for(int j = loc + 1; j < list.length; j++)
{
newlist[j - loc - 1] = list[j];
}
return newlist;
}
public static int[] passSlice (int[] list, int loc)
{
int [] newlist = list;
if(loc >= 0)
{
newlist = new int[list.length-1];
for(int k = 0; k < loc; k++)
{
newlist[k] = list[k];
}
for(int k = loc + 1; k < list.length; k++)
{
newlist[k-1] = list[k];
}
}
return newlist;
}
public static double calcVal(int [] list)
{
if(list.length < 8)
{
for(int i : list)
{
////System.out.print(i + ",");
}
////System.out.println();
return computeMean(list);
}
return smoothEstimate(list);
}
public static double computeMean(int[] V)
{
if(V.length == 1)
{
return V[0];
}
else if(V.length > 1)
{
double[] Es = new double[V.length];
for(int i = 0; i < V.length; i++)
{
int[] newVp = new int[V.length - 1];
for(int j = 0; j < i; j++)
{
newVp[j] = V[j];
}
for(int j = i + 1; j < V.length; j++)
{
newVp[j-1] = V[j];
}
double pass = computeMean(newVp);
int[] newVt = new int[V.length - i - 1];
for(int j = i + 1; j < V.length; j++)
{
newVt[j - i - 1] = V[j];
}
double take = V[i] + computeMean(newVt);
if(take > pass)
{
Es[i] = take;
}
else
{
Es[i] = pass;
}
}
double sum = 0;
for(double d : Es)
{
sum += d;
}
return sum/V.length;
}
else
{
return 0;
}
}
public static double smoothEstimate(int [] list)
{
double total = 0;
for(int i : list)
{
total+=i;
}
double ent = 0;
for(int i : list)
{
if(i > 0)
{
ent -= i/total * Math.log(i/total);
}
}
////System.out.println(" total " + total);
////System.out.println(" entro " + Math.exp(ent));
////System.out.println(" count " + list.length);
return total * Math.pow(Math.exp(ent),-0.5) * 4.0/3;// * 1.1287 + 0.05284);
}
public static int find(int[] list, int search)
{
int first = 0;
int last = list.length - 1;
int middle = (first + last)/2;
while( first <= last )
{
if ( list[middle] < search )
first = middle + 1;
else if ( list[middle] == search )
break;
else
last = middle - 1;
middle = (first + last)/2;
}
if(first > last)
{
return -1;
}
return middle;
}
}
controllore
import java.lang.Math;
import java.util.Random;
import java.util.ArrayList;
import java.util.Collections;
public class Controller2
{
public static void main(String [] args)
{
int size = 10000;
int rounds = 1001;
ArrayList<Integer> results = new ArrayList<Integer>();
for(int round = 0; round < rounds; round++)
{
int[] envelopes = new int[size];
for(int i = 0; i<envelopes.length; i++)
{
envelopes[i] = i+1;
}
shuffleArray(envelopes);
Player2 p = new Player2(size);
int cutoff = 0;
int winnings = 0;
for(int i = 0; i<envelopes.length; i+=2)
{
boolean [] take = p.takeQ(envelopes[i],envelopes[i+1]);
if(take[0] && envelopes[i] >= cutoff)
{
winnings += envelopes[i];
cutoff = envelopes[i];
}
if(take[1] && envelopes[i+1] >= cutoff)
{
winnings += envelopes[i+1];
cutoff = envelopes[i+1];
}
}
results.add(winnings);
}
Collections.sort(results);
System.out.println(rounds + " rounds, median is " + results.get(results.size()/2));
}
//stol... I mean borrowed from http://stackoverflow.com/questions/1519736/random-shuffling-of-an-array
static void shuffleArray(int[] ar)
{
Random rnd = new Random();
for (int i = ar.length - 1; i > 0; i--)
{
int index = rnd.nextInt(i + 1);
// Simple swap
int a = ar[index];
ar[index] = ar[i];
ar[i] = a;
}
}
}
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