Kekurangan makanan di Snakepit

Untuk pertama kalinya dalam 35 tahun, snakepit kehabisan makanan. Ular penghuni sekarang harus saling bertarung untuk bertahan hidup dari kekurangan makanan ini. Hanya satu ular yang bisa berdiri di puncak rantai makanan!

Papan peringkat

Belum datang!

Pembaruan terakhir pada 24 Februari

Tautan ke visualisasi pertandingan terakhir

Deskripsi

Jika Anda ingin memperjuangkan sisa apel / ceri / apa pun yang tersisa, Anda harus memberikan ular dalam bentuk program yang menerima input yang diberikan dan mengembalikan langkah selanjutnya.

Satu-satunya twist adalah bahwa Anda tidak sendirian di lubang Anda. Ular lain juga akan mencoba mendapatkan makanan langka! Tapi gelap di dalam snakepit sehingga Anda hanya bisa melihat diri sendiri dan apel. Menabrak lawan akan menghasilkan kematian Anda, seperti menggigit diri sendiri atau menabrak tembok. Selain itu, karena apel jarang ada hari ini, Anda kelaparan jika lawan makan cukup untuk mencapai panjang 7.

Snakepit adalah peta dua dimensi dengan lebar dan tinggi 15, sedangkan ubin terluar membangun dinding yang tidak bisa dilewati:

  0 1 2 . . . c d e
0 # # # # # # # # #
1 #               #
2 #           x   #
. #               #
. #               #
. #               #
c #               #
d #               #
e # # # # # # # # #

Koordinat tidak diindeks, jadi titik di mana xis akan 12,2.

Bot Anda akan dipanggil dengan dua argumen:

• Lokasi makanan
• Lokasi segmen tubuh Anda, dipisahkan oleh /

Maka harus menulis salah satu dari berikut ini ke stdout:

• L untuk seperempat belok kiri sebagai langkah selanjutnya
• R selama seperempat belokan kanan
• Ada hal lain untuk bergerak ke arah yang sama

Contoh:

Projects/Snakepit> python bot.py 12,2 4,8/4,9/3,9/2,9
'R'
Projects/Snakepit>

Aturan

Bot Anda diizinkan untuk:

• Keluarkan sesuatu, karena segala sesuatu adalah langkah yang valid
• Baca / tulis file di direktori sendiri yang berada di bawah ./snakes/ThisIsYourSnake
• Jalankan pada Ubuntu 14.04 dan Windows 7 (sebenarnya harus)

Bot Anda tidak boleh:

• Baca / tulis file di luar direktori sendiri
• Gunakan sumber daya eksternal seperti internet
• Miliki runtime di atas 10 detik per eksekusi

Anda harus memberikan jawaban Anda:

• Kode sumber bot
• Nama bot / ular
• (Nama Anda sendiri)
• Perintah untuk menjalankan bot Anda

Jika Anda ingin membuat hidup saya lebih mudah, berikan garis seperti CoolSnake MyOwnName python bot.py.

Mencetak gol

Ular Anda mendapat poin karena memenangkan pertandingan melawan ular lain. Game dimenangkan dalam kondisi berikut:

• Lawan Anda mengenai dirinya sendiri, Anda atau tembok
• Anda mencapai panjang 7

Selain itu, kedua ular kelaparan setelah 200 siklus.

Setiap ular akan bertarung 10 pertandingan untuk bertahan hidup melawan satu sama lain ular.

Contoh Bot

Sekadar memberi Anda ide, saya akan memberikan dua contoh ular (yang berpartisipasi) ini:

SneakySnake

#!/usr/bin/env python

import sys, random

def main(food, me) :
    food = [int(i) for i in food.split(",")]
    me = [[int(i) for i in seg.split(",")] for seg in me.split("/")]
    head = me[0]
    v = [head[0] - me[1][0], head[1] - me[1][1]]

    if food[0] < head[0] :
        vn = [-1, 0]
    elif food[0] > head[0] :
        vn = [1, 0]
    elif food[0] == head[0] :
        if food[1] < head[1] :
            vn = [0, -1]
        elif food[1] > head[1] :
            vn = [0, 1]

    if v == vn :
        return "..."
    elif [-v[1], v[0]] == vn :
        return "R"
    elif [v[1], -v[0]] == vn :
        return "L"
    else :
        return random.choice(("R", "L"))

if __name__ == "__main__" :
    print main(*sys.argv[1:3])

SneakySnake Cipher python bot.py

ViciousViper

#!/usr/bin/env python

import sys, random

def main(food, me) :
    food = [int(i) for i in food.split(",")]
    me = [[int(i) for i in seg.split(",")] for seg in me.split("/")]
    head = me[0]
    v = [head[0] - me[1][0], head[1] - me[1][1]]
    vn = [food[0] - head[0], food[1] - head[1]]
    if 0 not in vn :
        vn[v.index(0)-1] = 0
    vn[vn.index(0)-1] = vn[vn.index(0)-1] / abs(vn[vn.index(0)-1])

    if v == vn :
        return "..."
    elif [v[0] + vn[0], v[1] + vn[1]] == [0, 0] :
        return random.choice(("R", "L"))
    else :
        return "R" if [-v[1], v[0]] == vn else "L"

if __name__ == "__main__" :
    print main(*sys.argv[1:3])

ViciousViper Cipher python bot.py

Dan pertandingan mereka:

Program kontrol

Anda dapat menemukan program kontrol di github , beserta semua bot dan catatan pertandingan sebelumnya.

Persyaratan:

• Python 2 + perpustakaan numpydan pillow(Anda dapat memeriksa apakah mereka hadir melalui python -c "import numpy, PIL", jika ada kesalahan modul yang hilang)
• Menyalin struktur folder lengkap diperlukan agar pengontrol berfungsi
• Daftarkan bot Anda di ./snakes/list.txtfile dengan gayaCoolSnake MyOwnName Command To Run My Bot
• Tempatkan bot Anda di dalam direktori dengan namanya di bawah ./snakes
• Baik nama bot Anda maupun bot Anda tidak boleh mengandung spasi putih!

Pemakaian:

python run.py [-h] [-n int] [-s int] [-l int] [-c int] [-g]

python run.pyakan menjalankan turnamen dengan semua bot terdaftar di list.txt dan properti standar. Opsi lanjutan adalah:

• -h menampilkan pesan bantuan
• -n int putaran pertempuran untuk setiap kombinasi lawan
• -s int menentukan ukuran grid (lebar dan tinggi)
• -l int setel panjang yang dibutuhkan untuk menang
• -c int menetapkan batas siklus
• -gatau --no-gifstidak membuat gif pertandingan

Zen - C ++

Ini Codémon tidak ada di sini untuk makan tapi untuk melawan. Dia tahu bahwa musuh yang mati tidak akan mencuri apelnya.

Name| Author |Launch with

Zen GholGoth21 Zen.exe

Strategi

Semua orang (kecuali CircleOfLife) bergegas ke apel, tetapi bukan Zen, tidak selalu. Jika musuh dapat mencapai makanan sebelum dia, dia hanya menunggu di tengah (apa? Tapi apa yang kamu lakukan di sini, CircleOfLife?). Lain, Zen pergi ke apel dan berbalik sambil menunggu sesuatu terjadi. Bahkan, ia menggunakan apel sebagai umpan.

Saya tidak mengkodekan apa pun terhadap strategi CircleOfLife yang aneh karena dia hanya bisa menang dengan sangat banyak keberuntungan.

Kode

Ini adalah kode lengkap proyek C ++. Potong 11 file sumber dan Makefile dan kompilasi denganmake

$ cat src/* Makefile
/* 
 * @file    Enemy.cpp
 * @author  GholGoth21
 * @date    Créé le 1 mars 2015 à 14:10
 */

#include "Enemy.h"

#include <fstream>

Enemy::Enemy()
{
}

Enemy::~Enemy()
{
}

std::ostream &operator<<(std::ostream &os, const Enemy& e)
{
    return os<<e.m_pos<<" "<<e.m_date;
}

std::istream &operator>>(std::istream &is, Enemy& e)
{
    return is>>e.m_pos>>e.m_date;
}

int Enemy::distTo(int2 const &target, int date) const
{
    return m_pos.distTo(target)-(date-m_date);
}

bool Enemy::recentActivity(int2 const &pos, int date, int maxDelay) const
{
    return pos.distTo(m_pos)<=date-m_date && date-m_date<=maxDelay;
}
/* 
 * @file    Enemy.h
 * @author  GholGoth21
 * @date    Créé le 1 mars 2015 à 14:10
 */

#ifndef ENEMY_H
#define ENEMY_H

#include "int2.h"

class Enemy
{
public:
    Enemy();
    virtual ~Enemy();

public:
    void setPos(int2 const &pos, int date) { m_pos=pos; m_date=date; }
    int distTo(int2 const &target, int date) const;
    int2 const &pos() const { return m_pos; }
    bool recentActivity(int2 const &pos, int date, int maxDelay) const;
    friend std::ostream &operator<<(std::ostream &os, const Enemy& e);
    friend std::istream &operator>>(std::istream &is, Enemy& e);

private:
    int2 m_pos;
    int m_date;
};

#endif  /* ENEMY_H */
/* 
 * @file    Snake.cpp
 * @author  GholGoth21
 * @date    Créé le 28 février 2015 à 17:47
 */

#include "Snake.h"
#include "enums.h"
#include "StrManip.h"
#include "Enemy.h"

#include <vector>
#include <cmath>

Snake::Snake(std::string const &body)
{
    std::vector<std::string> posList;
    split(body, '/', posList);
    for(auto &pos : posList)
        m_body.push_back(int2(pos));
}

Snake::~Snake()
{
}

Command Snake::move(int2 food, int date, Enemy const &enemy)
{
    Command bestCommand[Command::count];

    int myDist=curPos().distTo(food);
    int enemyDist=enemy.distTo(food,date);

    if(myDist>=enemyDist && enemyDist>2)
    {
        orderCommand(int2(MAPSIZE/2,MAPSIZE/2), bestCommand);
        for(int i=0; i<Command::count; i++)
            if(validCommand(bestCommand[i]) && !enemy.recentActivity(nextPos(bestCommand[i]),date,5))
                return bestCommand[i];
    }
    if((myDist==1 && enemyDist>((len()-1)/2)*2+3) || enemyDist<-5)
    {
        orderCommand(food, bestCommand);
        for(int i=0; i<Command::count; i++)
            if(validCommand(bestCommand[i]))
                return bestCommand[i];
    }
    int2 embushPoint;
    int minDist=-1;
    foreach_enum(Direction, d)
    {
        int2 point(food+d.vector());
        int dist=point.quadDistTo(enemy.pos());
        if(dist<minDist || minDist<0)
        {
            minDist=dist;
            embushPoint=point;
        }
    }
    if(curPos().distTo(embushPoint)<enemy.distTo(embushPoint,date)-((len()-1)/2)*2)
    {
        int minimalAction=-1;
        int qMinDist = curPos().quadDistTo(embushPoint);
        Command minimalCommand;
        foreach_enum(Command, c)
        {
            int2 np=nextPos(c);
            int qDist = np.quadDistTo(embushPoint);
            if((qDist<minimalAction || minimalAction<0) && qDist>qMinDist && validCommand(c))
            {
                minimalAction=qDist;
                minimalCommand=c;
            }
        }
        return minimalCommand;
    }
    else
    {
        orderCommand(embushPoint, food, bestCommand);
        for(int i=0; i<Command::count; i++)
            if(validCommand(bestCommand[i]) && nextPos(bestCommand[i])!=food)
                return bestCommand[i];
    }



    return Command::forward;
}

bool Snake::validCommand(Command c) const
{
    if(!c.isValid())
        return false;
    int2 np = nextPos(c);
    if(!(0<np.x && np.x<MAPSIZE-1 && 0<np.y && np.y<MAPSIZE-1))
        return false;
    for(unsigned int i=2; i<m_body.size()-1; i++)
        if(np==m_body.at(i))
            return false;
    return true;
}

bool Snake::isStarting() const
{
    if(m_body.size()==3)
    {
        if(m_body.at(0)==int2(3,(MAPSIZE)/2) && m_body.at(1)==int2(2,(MAPSIZE)/2) && m_body.at(2)==int2(1,(MAPSIZE)/2))
            return true;
        else if(m_body.at(0)==int2(MAPSIZE-4,(MAPSIZE)/2) && m_body.at(1)==int2(MAPSIZE-3,(MAPSIZE)/2) && m_body.at(2)==int2(MAPSIZE-2,(MAPSIZE)/2))
            return true;
    }
    return false;
}

void Snake::orderCommand(int2 target, Command *tab)
{
    int weight[Command::count];
    foreach_enum(Command, c)
    {
        int2 np = nextPos(c);
        weight[c]=np.quadDistTo(target);
        tab[c]=c;
    }
    for(int i=0; i<Command::count-1; i++)
    {
        while(i>=0 && weight[tab[i]]>weight[tab[i+1]])
        {
            varSwitch(tab[i], tab[i+1]);
            i--;
        }
    }
}

void Snake::orderCommand(int2 target1, int2 target2, Command *tab)
{
    int weight[Command::count];
    foreach_enum(Command, c)
    {
        int2 np = nextPos(c);
        weight[c]=np.quadDistTo(target1)+np.quadDistTo(target2);
        tab[c]=c;
    }
    for(int i=0; i<Command::count-1; i++)
    {
        while(i>=0 && weight[tab[i]]>weight[tab[i+1]])
        {
            varSwitch(tab[i], tab[i+1]);
            i--;
        }
    }
}
/* 
 * @file    Snake.h
 * @author  GholGoth21
 * @date    Créé le 28 février 2015 à 17:47
 */

#ifndef SNAKE_H
#define SNAKE_H

#include "int2.h"

#include <vector>

#define MAPSIZE 15

class Enemy;

class Snake
{
public:
    Snake(std::string const &body);
    virtual ~Snake();

public:
    Command move(int2 food, int date, Enemy const &enemy);
    Direction curDir() const { return (m_body.at(0)-m_body.at(1)).direction(); }
    int2 curPos() const { return m_body.at(0); }
    int2 nextPos(Command c) const { return curPos()+curDir().applyCommand(c).vector(); }
    bool validCommand(Command c) const;
    bool isStarting() const;
    void orderCommand(int2 target, Command *tab);
    void orderCommand(int2 target1, int2 target2, Command *tab);
    int len() const { return m_body.size(); }

private:
    std::vector<int2> m_body;
};

#endif  /* SNAKE_H */
/* 
 * @file    StrManip.cpp
 * @author  GholGoth21
 * @date    Créé le 7 février 2015 à 17:26
 */

#include "StrManip.h"

#include <sstream>

std::vector<std::string> &split(const std::string &s, char delim, std::vector<std::string> &elems)
{
    std::stringstream ss(s);
    std::string item;
    while(std::getline(ss, item, delim))
        elems.push_back(item);
    return elems;
}

int atoi(std::string const &text)
{
    std::stringstream ss(text);
    int val;
    ss >> val;
    return val;
}
/* 
 * @file    StrManip.h
 * @author  GholGoth21
 * @date    Créé le 7 février 2015 à 17:26
 */

#ifndef STRMANIP_H
#define STRMANIP_H

#include <string>
#include <vector>

std::vector<std::string> &split(const std::string &s, char delim, std::vector<std::string> &elems);
int atoi(std::string const &text);

#endif  /* STRMANIP_H */
/* 
 * @file    enums.cpp
 * @author  GholGoth21
 * @date    Créé le 28 février 2015 à 17:55
 */

#include "enums.h"
#include "int2.h"

Command Direction::turnTo(Direction newDir) const
{
    if(!isValid() || !newDir.isValid())
        return Command::count; //Invalid
    else if((m_value==Direction::up && newDir==Direction::left) || (m_value==Direction::left && newDir==Direction::down) ||
            (m_value==Direction::down && newDir==Direction::right) || (m_value==Direction::right && newDir==Direction::up))
        return Command::left;
    else if((m_value==Direction::up && newDir==Direction::right) || (m_value==Direction::right && newDir==Direction::down) ||
            (m_value==Direction::down && newDir==Direction::left) || (m_value==Direction::left && newDir==Direction::up))
        return Command::right;
    else if(m_value==newDir)
        return Command::forward;
    else
        return Command::count; // Invalid
}

Direction Direction::applyCommand(Command c) const
{
    if(c==Command::forward)
        return m_value;
    else if(c==Command::left)
    {
        switch(m_value)
        {
            case Direction::left:
                return Direction::down;
            case Direction::up:
                return Direction::left;
            case Direction::right:
                return Direction::up;
            case Direction::down:
                return Direction::right;
            default:
                break;
        }
    }
    else if(c==Command::right)
    {
        switch(m_value)
        {
            case Direction::left:
                return Direction::up;
            case Direction::up:
                return Direction::right;
            case Direction::right:
                return Direction::down;
            case Direction::down:
                return Direction::left;
            default:
                break;
        }
    }
    return Direction::count; // Invalid
}

int2 Direction::vector() const
{
    switch(m_value)
    {
        case Direction::left:
            return int2(-1,0);
        case Direction::up:
            return int2(0,-1);
        case Direction::right:
            return int2(1,0);
        case Direction::down:
            return int2(0,1);
        default:
            return int2(0,0);
    }
}

std::ostream &operator<<(std::ostream &os, const Command& c)
{
    switch(c.m_value)
    {
        case Command::left:
            return os<<"L";
        case Command::right:
            return os<<"R";
        default:
            return os<<"F";
    }
}
/* 
 * @file    enums.h
 * @author  GholGoth21
 * @date    Créé le 28 février 2015 à 17:55
 */

#ifndef ENUMS_H
#define ENUMS_H

#include <ostream>

struct int2;

#define DECL_ENUM_STRUCT(_name) \
_name() : m_value(static_cast<Type>(0)) {} \
_name(Type value) : m_value(value) {} \
_name(int value) : m_value(static_cast<Type>(value)) {} \
static Type begin() { return static_cast<Type>(0); } \
static Type end() { return count; } \
_name &operator++() { m_value=static_cast<Type>(static_cast<int>(m_value)+1); return *this; } \
operator int() const { return static_cast<Type>(m_value); } \
Type m_value;

#define foreach_enum(_type,_var) for(_type _var = _type::begin(); _var<_type::end(); ++_var)

struct Command
{
    enum Type
    {
        left,
        forward,
        right,
        count
    };

    bool isValid() const { return m_value<count; }
    friend std::ostream &operator<<(std::ostream &os, const Command& c);

    DECL_ENUM_STRUCT(Command)
};

struct Direction
{
    enum Type
    {
        left,
        up,
        right,
        down,
        count
    };

    bool isValid() const { return m_value<count; }
    Command turnTo(Direction newDir) const;
    Direction applyCommand(Command c) const;
    int2 vector() const;
    DECL_ENUM_STRUCT(Direction)
};

#endif  /* ENUMS_H */
/* 
 * @file    int2.cpp
 * @author  GholGoth21
 * @date    Créé le 28 février 2015 à 17:37
 */

#include "int2.h"
#include "enums.h"
#include "StrManip.h"

#include <vector>
#include <cmath>

int2::int2()
{
}

int2::~int2()
{
}

int2::int2(std::string const &text)
{
    std::vector<std::string> posList;
    split(text, ',', posList);
    x=atoi(posList.at(0));
    y=atoi(posList.at(1));
}

Direction int2::direction() const
{
    if(x==0 && y==0)
        return Direction::count; // Invalid
    else if(y>=std::abs(x))
        return Direction::down;
    else if(x>=std::abs(y))
        return Direction::right;
    else if(x<=-std::abs(y))
        return Direction::left;
    else
        return Direction::up;
}

Direction int2::secondary() const
{
    if(x==0 || y==0)
        return Direction::count; //Invalid
    else if(y<=std::abs(x) && y>=0)
        return Direction::down;
    else if(x<=std::abs(y) && x>=0)
        return Direction::right;
    else if(x>=-std::abs(y) && x<=0)
        return Direction::left;
    else
        return Direction::up;
}

int int2::distTo(int2 const &other) const
{
    return std::abs(x-other.x)+std::abs(y-other.y);
}

int int2::quadDistTo(int2 const &other) const
{
    return sq(x-other.x)+sq(y-other.y);
}

int2 int2::operator+(int2 const &other) const
{
    return int2(x+other.x,y+other.y);
}

int2 int2::operator-(int2 const &other) const
{
    return int2(x-other.x,y-other.y);
}

std::ostream &operator<<(std::ostream &os, const int2& c)
{
    return os<<c.x<<","<<c.y;
}

std::istream &operator>>(std::istream &is, int2& c)
{
    std::string text;
    is>>text;
    c=int2(text);
    return is;
}
/* 
 * @file    int2.h
 * @author  GholGoth21
 * @date    Créé le 28 février 2015 à 17:37
 */

#ifndef INT2_H
#define INT2_H

#include "enums.h"

#include <string>

struct int2
{
public:
    int2();
    int2(int p_x, int p_y) : x(p_x), y(p_y) {}
    int2(std::string const &text);
    virtual ~int2();

public:
    Direction direction() const;
    Direction secondary() const;
    int distTo(int2 const &other) const;
    int quadDistTo(int2 const &other) const;
    int2 operator+(int2 const &other) const;
    int2 operator-(int2 const &other) const;
    bool operator==(int2 const &other) const { return x==other.x && y==other.y; }
    bool operator!=(int2 const &other) const { return x!=other.x || y!=other.y; }
    friend std::ostream &operator<<(std::ostream &os, const int2& c);
    friend std::istream &operator>>(std::istream &is, int2& c);

public:
    int x;
    int y;
};

inline int sq(int val) { return val*val; }
template<typename T>
inline void varSwitch(T &a, T &b) { T tmp=a; a=b; b=tmp; }

#endif  /* INT2_H */
/* 
 * @file    main.cpp
 * @author  GholGoth21
 * @date    Créé le 28 février 2015 à 17:23
 */

#include "int2.h"
#include "Snake.h"
#include "Enemy.h"

#include <cstdlib>
#include <iostream>
#include <fstream>

using namespace std;

/*
 * @brief La fonction principale du programme.
 * @param argc Le nombre de paramètres passés en ligne de commandes.
 * @param argv La liste des paramètres passés en ligne de commandes.
 */
int main(int argc, char** argv)
{
    /* Error handling */
    if(argc<3)
    {
        cerr<<"Error : not enough arguments on the command line."<<endl;
        cout<<"F"<<endl;
        return 1;
    }

    /* Init and load */
    int2 prevFood;
    int date = 0;
    Enemy enemy;
    ifstream load("PreviousState.txt");
    if(load)
    {
        load>>date;
        load>>prevFood;
        load>>enemy;
        load.close();
    }
    int2 food(argv[1]);
    Snake me(argv[2]);
    if(me.isStarting())
    {
        date=0;
        if(me.curPos().x<MAPSIZE/2)
            enemy.setPos(int2(MAPSIZE-4,MAPSIZE/2), 0);
        else
            enemy.setPos(int2(3,MAPSIZE/2), 0);
    }
    else if(prevFood!=food && me.curPos()!=prevFood)
    {
        enemy.setPos(prevFood, date);
    }

    /* Moving */
    cout<<me.move(food,date,enemy)<<endl;

    /* Saving */
    ofstream save("PreviousState.txt");
    if(save)
    {
        save<<++date<<endl;
        save<<food<<endl;
        save<<enemy<<endl;
        save.close();
    }
    return 0;
}
# Makefile
HEADERS = $(wildcard $(SRCPATH)/*.h)
SOURCES = $(wildcard $(SRCPATH)/*.cpp)
OBJECTS = $(patsubst $(SRCPATH)/%.cpp,$(BUILDPATH)/%.o,$(SOURCES))
M = Makefile

CFLAGS = -Wall -std=c++11

BINPATH = bin
BUILDPATH = build
SRCPATH = src

ifeq ($(OS),Windows_NT)
EXE = Zen.exe
else
EXE = Zen
endif


$(BINPATH)/$(EXE): $(BINPATH) $(BUILDPATH) $(OBJECTS)
    g++ -o $@ $(OBJECTS)

$(BUILDPATH)/%.o: $(SRCPATH)/%.cpp $(HEADERS) $M
    g++ $(CFLAGS) -o $@ -c $<

$(BINPATH) $(BUILDPATH):
    mkdir $@

clean:
    rm $(OBJECTS)

Atau unduh file zip: Zen.zip

Hasil

|     Name     |   Master   | Score |
|--------------|------------|-------|
| Zen          | GholGoth21 | 24    |
| SneakySnake  | Cipher     | 10    |
| ViciousViper | Cipher     | 6     |
| CircleOfLife | Manu       | 4     |

Dan beberapa pertempuran biasa (ViciousViper vs Zen dan SneakySnake vs Zen):

Sunting : Saya menambahkan pertempuran yang sangat menarik ini terhadap CircleOfLife:

CircleOfLife (Jawa)

CircleOfLife Manu java CircleOfLife(Kompilasi dengan javac CircleOfLife.java)

Berlari menuju tengah dan tetap di sana. Saya berharap bahwa beberapa pengiriman akan menabraknya dalam perjalanan ke makanan.

import java.awt.Point;
import java.util.ArrayList;
import java.util.List;  

public class CircleOfLife {
    private static final int UP = 0;
    private static final int DOWN = 1;
    private static final int LEFT = 2;
    private static final int RIGHT = 3;
    private static final String GO_RIGHT = "R";
    private static final String GO_LEFT = "L";
    private static final String GO_FORWARD = "F";
    private static int currentDirection = UP;
    private static List<Point> snakeParts = new ArrayList<>();

    public static void main(String[] args) {
        String[] parts = args[1].split("/");
        for (String part : parts) {
            String[] pos = part.split(",");
            int x = Integer.parseInt(pos[0]);
            int y = Integer.parseInt(pos[1]);
            snakeParts.add(new Point(x,y));
        }
        Point head = snakeParts.get(0);
        Point neck = snakeParts.get(1);
        if (head.y - neck.y == 1) {
            currentDirection = DOWN;
        } else if (head.x - neck.x == -1) {
            currentDirection = LEFT;
        } else if (head.x - neck.x == 1) {
            currentDirection = RIGHT;
        }
        if (isInMiddle(head)) {
            makeCircle();
        } else {
            runToMiddle();
        }
    }

    private static void makeCircle() {
        if (!isInMiddle(snakeParts.get(1))) {
            System.out.println(GO_FORWARD);
            return;
        }
        Point head = snakeParts.get(0);
        Point neck = snakeParts.get(1);
        String output = GO_FORWARD;
        if (head.x == 8 && neck.x == 8) {
            output = currentDirection == UP ? GO_LEFT : GO_RIGHT;
        } else if (head.x == 7 && neck.x == 7) {
            output = currentDirection == UP ? GO_RIGHT : GO_LEFT;           
        } else if (head.y == 8 && neck.y == 8) {
            output = currentDirection == RIGHT ? GO_LEFT : GO_RIGHT;        
        } else if (head.y == 7 && neck.y == 7) {
            output = currentDirection == RIGHT ? GO_RIGHT : GO_LEFT;        
        }
        System.out.println(output);
    }

    private static void runToMiddle() {
        Point head = snakeParts.get(0);
        int dX = 8 - head.x;
        int dY = 8 - head.y;
        String output = GO_FORWARD;

        if (Math.abs(dX) > Math.abs(dY)) {
            switch (currentDirection) {
                case DOWN: output = dX < 0 ? GO_RIGHT : GO_LEFT; break;
                case UP: output = dX < 0 ? GO_LEFT : GO_RIGHT; break;
                case RIGHT: output = dX < 0 ? GO_RIGHT : GO_FORWARD; break;
                case LEFT: output = dX < 0 ? GO_FORWARD : GO_RIGHT; break;
            }
        } else {
            switch (currentDirection) {
                case DOWN: output = dY < 0 ? GO_RIGHT : GO_FORWARD; break;
                case UP: output = dY < 0 ? GO_FORWARD : GO_RIGHT; break;
                case RIGHT: output = dY < 0 ? GO_LEFT : GO_RIGHT; break;
                case LEFT: output = dY < 0 ? GO_RIGHT : GO_LEFT; break;
            }
        }
        System.out.println(output);
    }

    public static boolean isInMiddle(Point snakePart) {
        if ((snakePart.x == 7 || snakePart.x == 8) && 
                (snakePart.y == 7 || snakePart.y == 8)) {
            return true;
        }
        return false;
    }
}