Final Exam 01.Concert my solution

function solve(input) {
   let bandToPrint = input.pop();
   let totalTime = 0;

   let bands = {};
   let playTimes = {};


   const add = (bandName, members) => {
      if (!bands[bandName]) {
         bands[bandName] = [];
      }
      let currentMembers = bands[bandName];
      let newMembers = [...currentMembers, ...members];
      newMembers = [...new Set(newMembers)];
      bands[bandName] = newMembers;
   };

   const play = (bandName, time) => {
      if (!playTimes[bandName]) {
         playTimes[bandName] = 0;
      }
      playTimes[bandName] += time;
      totalTime += time;
   };

   for (let line of input) {
      if (line === 'start of concert') {
         break;
      }
      let [command, band, otherParams] = line.split('; ');
      if (command === 'Add') {
         let members = otherParams.split(', ');
         add(band, members);
      } else if (command === 'Play') {
         let time = Number(otherParams);
         play(band, time);
      }

   }
   console.log(`Total time: ${totalTime}`);

   let sortedPlayTime = Object.entries(playTimes)
      .sort((a, b) => {
         return b[1] - a[1] || a[0].localeCompare(b[0]);
      })
      .forEach(element => {
         console.log(`${element[0]} -> ${element[1]}`);
      });
   console.log(bandToPrint);
   bands[bandToPrint].forEach(element => {
      console.log(`=> ${element}`);
   });

}