Java- Assignment 3 Solved

You are free to design other fields and methods not mentioned in this document to help you complete this assignment.
For the first 2 problems: 
They are independent and have same submission method as problems of the previous assignment.
You're encouraged to declare and implement methods as described in the description, but you are NOT forced to do that.
For the last 4 problems: 
They are related to each other and have different submission approach from ealier ones. You may need to submit several Java files according to the submission requirement described in each problem. DON'T change the class names to Main .
Please make sure every field, including its type and modifiers, every method, including its modifiers, parameters (number, type and order), return type are ABSOLUTELY IDENTICAL as this document describes.

1. [Easy] Room Escape 
You are called as the Ultimate Programmer (超高校级的程序员). Once you woke up and found that you are stuck in a mysterious room. On the walls there are many strings that you don't know what it means.
A strange voice informs you that the password includes 3 parts of puzzles. You need to figure out all these puzzles to get out of this room! Don't worry, as you are the best programmer, use your super coding ability to solve them!

Description 
On the wall there is a string which ends with a integer N. You immediately noticed that it is a Fence cipher(栅栏密码). The rule is that every N letters in this English string should be divided into a group. Then the group should be printed out in a specific order. 
For example: If the input is HLEOL2 , then HLEOL will be divided into 3 groups as HL , EO and L . Then it should take the first letter of each group, then the second letter. By this rearrangement, you will get HELLO . 
Please implement a method getFence() to take in the cipher as input and return the decrypted string.

Beside the fence cipher, there are also several strings with a integer N. You noticed that it could be the Caesar Cipher(凯撒密码)! The integer N must be how many letters are shifted in alphabet between the cipher and plain. 
For example: if the cipher is ALD and N is 3 , 3 means that the letter order should be shifted as A>D , L->O and D->G . At last the plain will be DOG .
Please implement a method getCaesar() to take in the cipher and N as input and return the decrypted string.
Sample 
Input Parameters:
cipher: Q TJ WQTW N: 3
Return Value: T WM ZTWZ
All the plain-texts returned should be an English string without lowercase. 

1.3 Method getAnswer() 

Description 
You are near to victory now, ultimate programmer! 
Finally, you discover a piece of paper with a table on it. You know it is definitely Vigenere Cipher(维吉尼亚密码)! Also, the paper tells you that the final passward should be decrypted by the following way:
consider the decrypted string by Caesar Cipher as the cipher of Vigenere Cipher consider the first M digits of the decrypted string by Fence Cipher as the key of Vigenere Cipher
The table below shows the decryption method using cipher, key in Vigenere Cipher. 

which is J. 
If the cipher is AOPKE , the key is AB , expand the length of key by repeating the key, to the length of cipher like ABABA . Then, do the corresponding decryption as taught. 
Please implement a method getAnswer() to take in the origin Fence Cipher fenceCipher , the origin Caesar Cipher caesarCipher , caesarN and the length M of the key as input and return the final answer.
Sample 
Input Parameters: 
fenceCipher: PCSOEHGDAIO4 caesarCipher: Q TJ WQTW caesarN: 3 M: 5
Return Value: I AM BALD
All the plain-texts should be returned without lowercase. 

1.4 Main Procedure 
Now you have implemented 3 super useful ultimate decrypting methods. They will be used in main procedure to solve all the puzzles in this room:

Input Format 
First line is the cipher of Fence Cipher fCipher
Second line is the cipher of Caesar Cipher cCipher
Third line only contains the shift value of Caesar Cipher cN
Fourth line only contains the value M
Agreement on data range: 
For Fence Cipher, we guarantee that fCipher will be a continuous string in only English followed by an integer. 
the groups value N used in this decryption is an integer in range [1, 9], no bigger than the length of cipher-text.
.
When doing the last decryption, Please only decrypt the English part and keep the others. When decrypting non-English part, the key will NOT go to the next digit.
Sample 
Sample input 

Sample output 


2. [Hard] Danganronpa 
Monokuma leads you to a room through a secret entrance. "This is the class trial field! It's a special place that will decide your fates!" Monokuma says, "Don't be afraid, the trial is not designed for you. Instead, I'd like you to use JAVA helping me solve some problems in the class trial", says the Monokuma. 
"Puhuhuhuhuhu... in order to explain my rules more clearly, please look at the brochure!" After saying that, Monokuma gives you the following message:
Hint 
1. Large input data, you may need Java Fast IO in https://github.com/Penguin134/CS102A22S12
2. You are likely to encounter TLE in this question, which is quite normal. So, you need a more efficient way to solve TYPE 3 event and the Final Task.
3. We provide a solution: hash code (Algorithm: ripemd128) 
30557199a7502078b04d8ba665a4e5c5
Problem Description 
There will be events in a class trial. All the events can be classified as 3 types.
TYPE 1: A participant (excluding you) declare his/her statement (a string).

TYPE 2: You blast a Truth Bullet (a string). 
At the initial state, you have a specific value of Influence Gauge. In each event of TYPE 2 you should do the following operations:
Storage the Truth Bullet in ArrayList<> tb for further uasge.
Your Influence Gauge will increase by 1 . 
Return and print the median (integer) of the length of the statements L . 
The medium of is defined as the element of after it is sorted. For example:
If stm = ["ab","abcdef","abcd"] , then length = [2,5,4] . After sorted, length = [2,4,5] . Hence, the median L is the element of length , which is 4 .
For special cases:
Return and print 0 when no one has put forward any statement. 
If your Influence Gauge I is less than L , your Influence Gauge will decrease by the number of statements now. 
ATTENTION: You should consider ALL the statements here. These steps should be completed in sequence

TYPE 3: Question Time. 
Return and print how many pairs of <statement,Truth Bullet> are matched. Here we define a pair of string <a,b> is matched if and only if a equals b and a is provided earlier than b . For example:
When 1st event happens, stm = ["Monokuma"],tb = [] there is no matched pair. When 2nd event happens, stm = ["Monokuma"],tb = ["Monokuma"] there is one matched pair. 
When 3rd event happens, stm = ["Monokuma","Monokuma"],tb = ["Monokuma"] there is still one matched pair because the second element in stm is provided later than first element in tb .
ATTENTION: You should consider ALL the statements before the Truth Bullets here. 

Final Task: After all the event happened, you should tell Monokuma whether you can win the class trial. Here is an equation for you to calculate your final score:

Print Qi Fei when 
Print Fail when OR if your Influence Gauge drops below 0 in any TYPE 2 event (no matter the ).
ATTENTION: You should not change the value of Influence Gauge while calculating .
Input Format: 
1st line contains two intergers and . 2nd line contains n intergers, indicating 3rd ~ (2+ )th line are the events:
For type 1, each line contains a number 1 and a string s. String s denotes the content of the event.
For type 2, each line contains a number 2 and a string s. String s denotes the content of the event.
For type 3, each line contains only one number 3 , denoting the type of event.
Output Format: 
For every event, you should follow this output format: 
For event TYPE 1, you shouldn't print anything. 
For event TYPE 2 and TYPE 3, you should print a number in one line. And finally you should print whether you win the trial or not.
Agreement on data range:

We ensure that there won't be any blank space in a single string. 
Samples 
Sample input 1

Sample output 1

Explanation 1

pairMatch() .
Sample input 2

Sample output 2

Explanation 2

Thus, your Influence Gauge becomes less than 0 at the 5th events. You fail the trial. 
Sample input 3

Sample output 3

Explanation 3

It's okay that you didn't say anything before the end. Maybe that's the so-called win effortlessly 😅.

Question 3-6 Pokémon 
Designer: Zhou Junhong, Liu ZhiChen
Tester: Nie Qiushi, Wang Biao, Zhang Shaofeng
Description： 
Máo máo and Fatherpucci are freshmen at SUSTech. When they were about to experience university life, they found that the State Press and Publication Administration had issued a "Notice on Further Strict Management to Effectively Prevent Minors from Indulging in Online Games". Because they are under 18, they are limited to playing games for 3 hours a week. However, they just took the Java course, they plan to write a Pokémon game by themselves. The main framework has been set up. Please help them to complete the code together.
3. [Easy] Skill (5 points) 
Design a class named Skill . It describes the information of a certain skill and will be used in Battle .
3.1. Attributes： 
private String name : Represents skill's name.
private int cd : Represents skill's Cool Down Time, it will be released when the cd is 0 in the battle.
private int atk : Represents skill's damage while releasing.
3.2. Constructors: 

NOTICE:
Please check the validity of the parameters: All int type parameters should be greater than 0. If any invalid parameter is detected, please set the attributes to default values:
1 name = "error"; cd = 51; atk = 0;
The detailed cd description will be explained in the battle.
3.3. Getters: 

In these getters, please just return the corresponding attributes.
Notice that we don't need any setters as the attributes are not required to be modified by other classes.
Submission： 
For this question, submit one java file: Skill.java .

4. [Easy] Pokemon 
Design a class named Pokemon . Pokemon will fight in the battle .
4.1. Attributes： 
private String name : Represents Pokémon's name such as “Pikachu”. private int hp : Represents Pokémon's remaining health. private int atk : Represents Pokémon's normal attack damage. private int level : Represents Pokémon's level. private int speed : Represents Pokémon's agility which will determine the order of attack. private int rateAtk : Represents Pokémon's atk increased per level. private int rateHp : Represents Pokémon's hp increased per level.
Skill skill : Represents Pokémon's skill.
NOTICE:
To simplify the question, each Pokémon has only one skill.
4.2. Constructors: 

NOTICE:
You don't need to check the data input, we guarantee the validity of the data input.
4.3. Setters: 

In these setters, please just replace the corresponding attribute of the object with the input parameter.
4.4. Getters: 

In these getters, please just return the corresponding attributes.
4.5. Other Methods: 
4.5.1. levelUP 
This method will be called to increase Pokémon's level by input parameter up , which represents the number of levels it will increase. Meanwhile, its atk and hp will also increase by the functions below:
4.5.2. learnSkill 
Pokémon will learn the skill of the input parameter skill , this will usually happened during a level up. However, you are NOT required to judge when to invoke this method because it will be called manually when we test.
NOTICE:
You are free to design other methods to help you complete this assignment, including but not limited to getters and setters. 
Submission 
For this question, submit two java files: Pokemon.java , Skill.java .

5. [Medium] Player 
You need to write a public class named Player, which is used to create player account and store player data (which are pokemons).
(PS: The name of all variables must strictly match the name bolded in the question)
5.1. Attributes: 
You are required to write member variables account, password, mail, phoneNumber into the class. 
private final String account : account number, generated by method generateAccount() described in 5.6 private String password private Mail mail private PhoneNumber phoneNumber
ArrayList<Pokemon> pokemons : an ArrayList to store Pokémons owned by this player. Don't forget to create an ArrayList object with new .
You need to write two additional classes named Mail and PhoneNumber, each has a String to store mail or phone number, and a constructor. What you need to pay attention to is the all members must be private, because you need to keep your data safe. However, the member in Mail and PhoneNumber is not required to be private. Your Mail and PhoneNumber should be two classes declared in the file Player.java . 
The validity of the structure of mail and phone number are not the point we check, so you don't need to verify the validity of their structure.
5.2. Constructors: 
1 public Player(Mail mail, String password) 2 public Player(PhoneNumber phoneNumber,String password) 3 public Player(Mail mail, PhoneNumber phoneNumber,String password)
You need to write three constructors for each of the three situations for creating an account:
1.Using mail to create an account.
2.Using phone number to create an account.
3.Using both to create an account.
5.3. Checkers: 
1 public boolean checkIdentity(Mail mail, String password) 2 public boolean checkIdentity(PhoneNumber phoneNumber, String password)
You need to write two methods to check the identity of player when he/she logs in. Only when the data input is match the data you stored means the player passes it successfully. If succeed return true, else return false.
5.4. Setters: 
1 public boolean setMail(PhoneNumber phoneNumber, String password, Mail mail) 2 public boolean setPhoneNumber(Mail mail, String password, PhoneNumber phoneNumber) 
You need to write two methods to set (or to change) the mail or phone number. You need to check the player's identity first, after that you can change the data. If succeed return true, else return false.
5.5. Getters: 

In these getters, please just return the corresponding attributes.
5.6. Account Generator: 
You need to write a method that can generate account automatically. The account must be a random number string with length 7, and the first number of it can't be 0.

Attention: 
1. This method should be invoked when you create an account. The return value should be assigned to the attribute account .
2. Once your account is created, it can't be changed anymore.
5.7. Change Password: 

You need to write two method to change your password. You need to check the player's identity first, after that you can change the password. If succeed return true, else return false.
5.8. Add Pokemon: 

the input Pokémon object is valid.
Submission: 
For this question, submit three java files: Player.java , Pokemon.java , Skill.java .
PS: Your Mail and PhoneNumber should be two classes declared in the file Player.java . 

6. [Hard] Battle (20 points) 
After finished the class Player and Pokemon, you finally can write a battle system. You are required to write a class named Battle, which contains only one static method named tatakai.
6.1 tatakai: 

The process of a battle is as below. I know this should be a hard time, but please read the following text carefully:
Process 
The round limit is 50.
First you need to input two players p1 and p2. Then you should get the first Pokémon from the two players' pokemon list seperately. Compare these two Pokémons' speed, the faster one will start first (if same, then p1 start first). After these preparations, the battle starts.
Pokémons attack each other in each turn. The rule of generating damages is: pok2.hp -= pok1.atk; pok1.hp -= pok2.atk;
If Pokémon has skill, it will use its skill in the battle when the cd is reached. The cd starts calculating at the moment when the Pokémon get into the stage, when the cd is reached, Pokémon will replace its normal attack by skill. The skill can be used infinite times. When the skill is released, it start to count cd again. 
If one Pokémon's hp comes to 0, this round over and this Pokémon will quit the stage. The Pokémon whose hp is not 0 will stay on the stage. The player who lost his Pokémon should let his next Pokémon get into the stage, and do speed judge again to decide which side starts first, and repeat the battle above, until one player loses all his Pokémons, or the round has reach the limit, the game is over. 
When the game is over, the one who still have Pokémon is the winner, you should return this player. If the round has reach the limit (at the end of round 50) and no one lose, the game ends in a draw, and you should return null instead of player.
Also, before return statement, the hp of all the Pokémons should be refilled to its initial value.
NOTICE：
The round you record over the upper limit of the number of rounds and the round you used to calculate when to release the skill are not the same round.
We ensure the two Players both have at least one Pokémon in the list pokemons when tatakai.
Submission: 
For this question, submit four java files: Battle.java , Player.java , Pokemon.java , Skill.java .

Test Procedure Sample