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EvgeniJD avatar EvgeniJD 35 Точки

Star Enigma / RegExp Exercices

Здравейте!

Някой може ли да ме насочи към решаването на въпросната задача със 100/100 (аз стигнах до 80/100) и евентуално да ми каже къде греша. Ще съм ви изключително благодарен! Решението ми: https://pastebin.com/wjvWvPia

Задачата : 

1.Star Enigma

The war is in its peak, but you, young Padawan, can turn the tides with your programming skills. You are tasked to create a program to decrypt the messages of The Order and prevent the death of hundreds of lives.

You will receive several messages, which are encrypted using the legendary star enigma. You should decrypt the messages, following these rules:

To properly decrypt a message, you should count all the letters [s, t, a, r]case insensitive and remove the count from the current ASCII value of each symbol of the encrypted message.

After decryption:

Each message should have a planet name, population, attack type ('A', as attack or 'D', as destruction) and soldier count.

The planet name starts after '@' and contains only letters from the Latin alphabet.

The planet population starts after ':' and is an Integer;

The attack type may be "A"(attack) or "D"(destruction) and must be surrounded by "!" (exclamation mark).

The soldier count starts after "->" and should be an Integer.

The order in the message should be: planet name -> planet population -> attack type -> soldier count. Each part can be separated from the others by any character except: '@', '-', '!', ':' and '>'.

Input / Constraints

  • The first line holds n – the number of messagesinteger in range [1…100];
  • On the next n lines, you will be receiving encrypted messages.

Output

After decrypting all messages, you should print the decrypted information in the following format:

First print the attacked planets, then the destroyed planets.
"Attacked planets: {attackedPlanetsCount}"
"-> {planetName}"
"Destroyed planets: {destroyedPlanetsCount}"
"-> {planetName}"

The planets should be ordered by name alphabetically.

Examples

Input

Output

Comments

2

STCDoghudd4=63333$D$0A53333

EHfsytsnhf?8555&I&2C9555SR

Attacked planets: 1

-> Alderaa

Destroyed planets: 1

-> Cantonica

We receive two messages, to decrypt them we calculate the key:

First message has decryption key 3. So we substract from each characters code 3.

PQ@Alderaa1:30000!A!->20000

The second message has key 5.

@Cantonica:3000!D!->4000NM

Both messages are valid and they contain planet, population, attack type and soldiers count.

After decrypting all messages we print each planet according the format given.

Input

Output

Comments

3

tt(''DGsvywgerx>6444444444%H%1B9444

GQhrr|A977777(H(TTTT

EHfsytsnhf?8555&I&2C9555SR

Attacked planets: 0

Destroyed planets: 2

-> Cantonica

-> Coruscant

We receive three messages.

Message one is decrypted with key 4:

pp$##@Coruscant:2000000000!D!->5000

Message two is decrypted with key 7:

@Jakku:200000!A!MMMM

This is invalid message, missing soldier count, so we continue.

The third message has key 5.

@Cantonica:3000!D!->4000NM

"It’s a trap!" – Admiral Ackbar

Тагове:
0
JavaScript Fundamentals 23/03/2020 13:27:53
willystyle avatar willystyle 2420 Точки
Best Answer

ред 10 го направи с безопасно взимане на стойност:
 

let key = encryptedMessage.match(keyPattern) && encryptedMessage.match(keyPattern).length;

0
EvgeniJD avatar EvgeniJD 35 Точки

Проверих дали key !== null, след което промених стойността на key = key.length . Трябва да се науча да проверявам всяка променлива свързана с regExp за null. Не знам дали това имаше предвид, но получих 100/100! Благодаря ти ОТНОВО!!!

1
J.Encheva avatar J.Encheva 1 Точки

и аз забих на абсолютно същото :D много благодаря !

1