Care of Puppy

function careOfPuppy(input) {
    let food = Number(input[0]) * 1000;
    let i = 1;

    let command = input[i++]
    while (command !== "Adopted") {
        food -= Number(command);
        command = input[i++];
    }

    if (food >= 0) {
        console.log(`Food is enough! Leftovers: ${food} grams.`)
    } else {
        console.log(`Food is not enough. You need ${Math.abs(food)} grams more.`);
    }
}

РЕШЕНИЕ С FOR:

function careOfPuppy(input) {
    let food = Number(input[0]) * 1000;

    let command;
    for (let i = 1; i < input.length; i++) {
        command = input[i];
        if (command === "Adopted") {
            break;
        }
        food -= Number(command);
    }

    if (food >= 0) {
        console.log(`Food is enough! Leftovers: ${food} grams.`)
    } else {
        console.log(`Food is not enough. You need ${Math.abs(food)} grams more.`);
    }
}

РЕШЕНИЕ СЪС SHIFT() И ТЕРНАРЕН ОПЕРАТОР ЛЕКО ТАРИКАТСКАТА:)

function careOfPuppy(input) {
    let food = Number(input.shift()) * 1000;

    while (input[0] !== "Adopted") {
        food -= Number(input.shift());
    }

    console.log(food >= 0 ? `Food is enough! Leftovers: ${food} grams.`
        : `Food is not enough. You need ${Math.abs(food)} grams more.`);
}

РЕШЕНИЕ БЕЗ ЦИКЪЛ:

function careOfPuppy(input) {
    let food = Number(input.shift()) * 1000 - input.slice(0, -1).map(Number).reduce((a, b) => a + b, 0);

    console.log(food >= 0 ? `Food is enough! Leftovers: ${food} grams.` : `Food is not enough. You need ${Math.abs(food)} grams more.`);
}