FlourPackProblem.java

package com.TimBuchalka;

//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 FlourPackProblem {

    public static boolean canPack(int bigCount, int smallCount, int goal){
        int i = 0;

        if ((bigCount < 0) || (smallCount < 0) || (goal < 0)) {
            return false;
        }

        while (i < bigCount && goal - 5 >= 0) {
            goal -= 5;
            i++;
        }

        return smallCount >= goal;
    }
}