Auto-Engineering Company

function solve(input) {
    const cars = new Map;

    for (const line of input) {
        let [brand, model, quantity] = line.split(" | ");
        quantity = Number(quantity);

        if (!cars.has(brand)) {
            cars.set(brand, {});
        }
        if (!cars.get(brand).hasOwnProperty(model)) {
            cars.get(brand)[model] = quantity;
        } else {
            cars.get(brand)[model] += quantity;
        }
    }
    for (const car of cars) {
        console.log(car[0]);
        const models = car[1];
        for (const model of Object.keys(models)) {
            console.log(`###${model} -> ${models[model]}`)
        }
    }
}