MainFlourPacker.java

// Write a method named canPack with three parameters of type int named bigCount, smallCount, and goal.  

// The parameter bigCount represents the count of big flour bags (5 kilos each).  

// The parameter smallCount represents the count of small flour bags (1 kilo each).  

// The parameter goal represents the goal amount of kilos of flour needed to assemble a package.  

// Therefore, the sum of the kilos of bigCount and smallCount must be at least equal to the value of goal. The method should return true if it is possible to make a package with goal kilos of flour.  

// If the sum is greater than goal, ensure that only full bags are used towards the goal amount. For example, if goal = 9, bigCount = 2, and smallCount = 0, the method should return false since each big bag is 5 kilos and cannot be divided. However, if goal = 9, bigCount = 1, and smallCount = 5, the method should return true because of 1 full bigCount bag and 4 full smallCount bags equal goal, and it's okay if there are additional bags left over.

// If any of the parameters are negative, return false.  

// EXAMPLE INPUT/OUTPUT:  

// canPack (1, 0, 4); should return false since bigCount is 1 (big bag of 5 kilos) and goal is 4 kilos.
// canPack (1, 0, 5); should return true since bigCount is 1 (big bag of 5 kilos) and goal is 5 kilos.
// canPack (0, 5, 4); should return true since smallCount is 5 (small bags of 1 kilo) and goal is 4 kilos, and we have 1 bag left which is ok as mentioned above.
// canPack (2, 2, 11); should return true since bigCount is 2 (big bags 5 kilos each) and smallCount is 2 (small bags of 1 kilo), makes in total 12 kilos and goal is 11 kilos.
// canPack (-3, 2, 12); should return false since bigCount is negative.
 


public class MainFlourPacker {

    public static void main(String[] args) {
        System.out.println(canPack(1, 0, 4));   // Should return false
        System.out.println(canPack(1, 0, 5));   // Should return true
        System.out.println(canPack(0, 5, 4));   // Should return true
        System.out.println(canPack(2, 2, 11));  // Should return true
        System.out.println(canPack(-3, 2, 12)); // Should return false
    }

    public static boolean canPack(int bigCount, int smallCount, int goal) {
        if (bigCount < 0 || smallCount < 0 || goal < 0) {
            return false;
        }
        if (goal > ((bigCount * 5) + smallCount)) {
            return false;
        }
        if ((goal % 5) <= smallCount) {
            return true;
        }
        return false;
    }
}