Problem 1 – Concert
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dstoianov891 avatar dstoianov891 18 Точки

Concert JavaScript Exam 16.12.2019 sorting problem



Имам проблем с изпитна задача Concert oт изпита на 16.12.2018. Judge ми дава 80/100 и не мога да си оправя кода. Мисля че е нещо от сортирането, но не мога да го измисля. Може ли някой да помогне? Предварително благодаря!


Problem 1 – Concert

Mandy was hired to accept the group applications for the upcoming concert. She thought that it would be easy but now she is in trouble. She needs a programmer to make an application that will help her to safe the concert. She needs you.

You will read commands until you receive "start of concert" command.

There are two types of commands:

  • "Add; {bandName}; {member 1}, {member 2}, {member 3}" - applies a band and a list of members to the concert. All members must be unique so don't add duplicates. If you receive the same band twice add only those members that aren't present in the list.
  • "Play; {bandName}; {time}" – the band with the given name plays an amount of time on the stage.  If you receive a band that has already applied in the concert, just increase the band time.

If in both commands the band does not exist, add it.

At the end you have to print the total time and the bands ordered by the time on stage in descending order, then by band name in ascending order.

Also the final input line will be "{bandName}" and you have to print all members for this band in insertion order.

Input / Constraints

  • The time of the bands – integer in range [0 – 231 - 1]
  • There will always be at least one member in the group
  • The bands will always have time on stage
  • The final input line will always contain an existing band name
  • Input will always be valid and in the range specified. You don’t need to check it


Total time: {totalTime}

{firstBandName} -> {firstBandTime}

{secondBandName} -> {secondBandTime}

{thirdBandName} -> {thirdBandTime}

  • {firstMemberName}
  • {secondMemberName}
  • {thirdMemberName}




Play; The Beatles; 2584

Add; The Beatles; John Lennon, Paul McCartney, George Harrison, Ringo Starr

Add; Eagles; Glenn Frey, Don Henley, Bernie Leadon, Randy Meisner

Play; Eagles; 1869

Add; The Rolling Stones; Brian Jones, Mick Jagger, Keith Richards

Add; The Rolling Stones; Brian Jones, Mick Jagger, Keith Richards, Bill Wyman, Charlie Watts, Ian Stewart

Play; The Rolling Stones; 4239

start of concert

The Rolling Stones


Total time: 8692

The Rolling Stones -> 4239

The Beatles -> 2584

Eagles -> 1869

The Rolling Stones

=> Brian Jones

=> Mick Jagger

=> Keith Richards

=> Bill Wyman

=> Charlie Watts

=> Ian Stewart

Add; The Beatles; John Lennon, Paul McCartney

Add; The Beatles; Paul McCartney, George Harrison

Add; The Beatles; George Harrison, Ringo Starr

Play; The Beatles; 3698

Play; The Beatles; 3828

start of concert

The Beatles

Total time: 7526

The Beatles -> 7526

The Beatles

=> John Lennon

=> Paul McCartney

=> George Harrison

=> Ringo Starr


JavaScript Fundamentals
willystyle avatar willystyle 2466 Точки
Best Answer
let sorted = concertArr.sort((a, b) => {
    return b[1]['time'] === a[1]['time'] ? a[0].localeCompare(b[0]) : b[1]['time'] - a[1]['time'];


dstoianov891 avatar dstoianov891 18 Точки