demo final Feed the animals 03.

function solve(input) {
    let animals = {}; // key - string, value - number
    let areas = {}; //key - string, value - string []

    for (let line of input) {
        if (line === 'Last Info') {
            break;
        }
        let [command, animalName, food, area] = line.split(':');
        if (command === 'Add') {
            addAnimal(animalName, food, area);
        } else {
            feedAnimal(animalName, food, area);
        }
    }
    let sortedAnimals = Object.entries(animals).sort(sortAnimals);
    console.log("Animals:");
    for (let [animalName, food] of sortedAnimals) {
        console.log(`${animalName} -> ${food}g`);
    }

    let sortedAreas = Object.entries(areas).sort(sortAreas);

    console.log(`Areas with hungry animals:`);
    for (let [area, animals] of sortedAreas) {
        let hungryAnimals = animals.length;
        if (hungryAnimals > 0) {
            console.log(`${area} : ${animals.length}`);
        }

    }



    function addAnimal(animalName, dailyFoodLimit, givenArea) {
        dailyFoodLimit = Number(dailyFoodLimit);
        if (!animals.hasOwnProperty(animalName)) {
            animals[animalName] = dailyFoodLimit;
        } else {
            animals[animalName] += dailyFoodLimit;
        }
        if (!areas.hasOwnProperty(givenArea)) {
            areas[givenArea] = [animalName];
        } else {
            let animalsInArea = areas[givenArea];
            if (!animalsInArea.includes(animalName)) {
                animalsInArea.push(animalName);
            }
        }
    }

    function feedAnimal(animalName, food, givenArea) {
        food = Number(food);
        if (animals.hasOwnProperty(animalName)) {
            animals[animalName] -= food;
        }

        if (animals[animalName] <= 0) {
            console.log(`${animalName} was successfully fed`);
            delete animals[animalName];
            let animalsInArea = areas[givenArea];
            let indexOfAnimal = animalsInArea.indexOf(animalName);
            animalsInArea.splice(indexOfAnimal, 1);
        }
    }

    function sortAnimals(a, b) {
        let aAnimalFood = a[1];
        let bAnimalFood = b[1];
        let result = bAnimalFood - aAnimalFood;
        if (result === 0) {
            let aAnimalName = a[0];
            let bAnimalName = b[0];
            return aAnimalName.localeCompare(bAnimalName);
        }
        return result;
        // return b[1] - a[1] || a[0].localeCompare(b[0]);
    }

    function sortAreas(a, b) {
        let aAnimalsCount = a[1].length;
        let bAnimalsCount = b[1].length;
        return bAnimalsCount - aAnimalsCount;
    }
}