function solve (params) {
  let areas = new Map()
  let animals = new Map()

  params.slice(0, params.length - 1).forEach(line => {
    let [command, name, food, area] = line.split(':')

    if (command === 'Add') {
      if (!animals.has(name)) {
        animals.set(name, 0)

        if (!areas.has(area)) {
          areas.set(area, 0)
        }

        areas.set(area, areas.get(area) + 1)
      }

      animals.set(name, animals.get(name) + Number(food))
    } else if (command === 'Feed' && animals.has(name)) {
      animals.set(name, animals.get(name) - food)

      if (animals.get(name) <= 0) {
        console.log(`${name} was successfully fed`)
        animals.delete(name)
        areas.set(area, areas.get(area) - 1)
      }
    }
  })

  console.log('Animals:')
  Array.from(animals)
    .sort(
      ([nameA, foodA], [nameB, foodB]) =>
        foodB - foodA || nameA.localeCompare(nameB)
    )
    .forEach(([name, food]) => console.log(`${name} -> ${food}g`))

  console.log('Areas with hungry animals:')
  Array.from(areas)
    .filter(([area, count]) => count > 0)
    .sort(([areaA, countA], [areaB, countB]) => countB - countA)
    .forEach(([area, count]) => console.log(`${area} : ${count}`))
}