function solve(input) {
    let X = Number(input.shift()); //square meter of the vineyard
    let Y = Number(input.shift()); //kilos of grapes per 1 square meter
    let Z = Number(input.shift()); //desired quantity of wine
    let workers = Number(input.shift());

    grapes = X * Y;
    let wine = (0.4 * grapes) / 2.5;
    let winerest = wine - Z;
    let wineDiff = Z - wine;
    let winePerWorker = winerest / workers;

    if (wine < Z) {
        console.log(`It will be a tough winter! More ${Math.floor(wineDiff)} liters wine needed.`)
    }
    else {
        console.log(`Good harvest this year! Total wine: ${Math.floor(wine)} liters.`);
        console.log(`${Math.floor(winerest)} liters left -> ${Math.floor(winePerWorker)} liters per person.`)
    }
}