03. Harvest

#include <iostream>
#include <cmath>

using namespace std;

int main() {
    const double VINEYARD_AREA_PERGENTAGE = 0.4;
    const double GRAPES_IN_KILOGRAMS_PER_LITER_OF_WINE = 2.5;

    int areaInSquareMetres;
    cin >> areaInSquareMetres;

    double amountOfGrapesPerSquareMeter;
    cin >> amountOfGrapesPerSquareMeter;

    int requiredAmountOfWineInLiters, numberOfWorkers;
    cin >> requiredAmountOfWineInLiters >> numberOfWorkers;

    double totalWine = areaInSquareMetres * VINEYARD_AREA_PERGENTAGE * amountOfGrapesPerSquareMeter / GRAPES_IN_KILOGRAMS_PER_LITER_OF_WINE;
    double diff = totalWine - requiredAmountOfWineInLiters;

    if (diff < 0) {
        cout << "It will be a tough winter! More " << floor(abs(diff)) << " liters wine needed." << endl;
    }
    else {
        cout << "Good harvest this year! Total wine: " << floor(totalWine) << " liters." << endl;
        cout << ceil(diff) << " liters left -> " << ceil(diff / numberOfWorkers) << " liters per person." << endl;
    }

    return 0;
}