Food For Pets

function foodForPets(input) {
    let days = Number(input[0]);
    let food = Number(input[1]);
    let dogsFood = 0;
    let catsFood = 0;
    let cookies = 0;
    let dayCount = 1;

    for (let i = 2; i <= days * 2; i += 2) {
        let dayFoodForDog = Number(input[i]);
        let dayFoodForCat = Number(input[i + 1]);

        if (dayCount % 3 === 0) {
            cookies += (dayFoodForDog + dayFoodForCat) / 10;
        }
        dogsFood += dayFoodForDog;
        catsFood += dayFoodForCat;
        dayCount++;
    }

    let totalFood = dogsFood + catsFood;
    console.log(`Total eaten biscuits: ${Math.round(cookies)}gr.`);
    console.log(`${(totalFood / food * 100).toFixed(2)}% of the food has been eaten.`);
    console.log(`${(dogsFood / totalFood * 100).toFixed(2)}% eaten from the dog.`);
    console.log(`${(catsFood / totalFood * 100).toFixed(2)}% eaten from the cat.`);
}

РЕШЕНИЕ СЪС SHIFT():

function foodForPets(input) {
    let days = Number(input.shift());
    let food = Number(input.shift());
    let dogsFood = 0;
    let catsFood = 0;
    let cookies = 0;

    for (let i = 1; i <= days; i++) {
        let dayFoodForDog = Number(input.shift());
        let dayFoodForCat = Number(input.shift());

        if (i % 3 === 0) {
            cookies += (dayFoodForDog + dayFoodForCat) / 10;
        }
        dogsFood += dayFoodForDog;
        catsFood += dayFoodForCat;
    }

    let totalFood = dogsFood + catsFood;
    console.log(`Total eaten biscuits: ${Math.round(cookies)}gr.`);
    console.log(`${(totalFood / food * 100).toFixed(2)}% of the food has been eaten.`);
    console.log(`${(dogsFood / totalFood * 100).toFixed(2)}% eaten from the dog.`);
    console.log(`${(catsFood / totalFood * 100).toFixed(2)}% eaten from the cat.`);
}

РЕШЕНИЕ С WHILE И SHIFT():

function foodForPets(input) {
    let days = Number(input.shift());
    let food = Number(input.shift());
    let dogsFood = 0;
    let catsFood = 0;
    let cookies = 0;
    let dayCount = 1;

    while (days-- !== 0) {
        let dayFoodForDog = Number(input.shift());
        let dayFoodForCat = Number(input.shift());

        if (dayCount++ % 3 === 0) {
            cookies += (dayFoodForDog + dayFoodForCat) / 10;
        }
        dogsFood += dayFoodForDog;
        catsFood += dayFoodForCat;
    }

    let totalFood = dogsFood + catsFood;
    console.log(`Total eaten biscuits: ${Math.round(cookies)}gr.`);
    console.log(`${(totalFood / food * 100).toFixed(2)}% of the food has been eaten.`);
    console.log(`${(dogsFood / totalFood * 100).toFixed(2)}% eaten from the dog.`);
    console.log(`${(catsFood / totalFood * 100).toFixed(2)}% eaten from the cat.`);
}