Care of Puppy

function solve(input) {
    let food = Number(input.shift()) * 1000;
    let eating = input.shift();
    let sum = 0;
    while(eating !== "Adopted"){
        sum += eating;
        eating = input.shift();
    }

    let leftovers = Math.abs(food - sum);

    if(sum <= food) console.log(`Food is enough! Leftovers: ${leftovers} grams.`)
    else console.log(`Food is not enough. You need ${leftovers} grams more.`);
}