public static double GetMaxPossibleCost(List <Item> allItems, Knapsack knapsack)
{
var table = new KnapsackTable(knapsack.TotalWeight);
foreach (var item in allItems)
{
ComputeMaxCostForEachWeight(knapsack, item, table);
table.NewLine();
}
return(table.GetResult());
}
private static void ComputeMaxCost(Item item, int weight, KnapsackTable table)
{
var currentItem = item;
var prevValueForThisWeight = table.GetPrevCost(weight);
var remainingWeight = weight - currentItem.Weight;
if (remainingWeight >= 0)
{
var maxValueInRemainingWeight = table.GetPrevCost(remainingWeight);
var valueWithThisItem = maxValueInRemainingWeight + currentItem.Cost;
var currentWeightMaxValue = Math.Max(prevValueForThisWeight, valueWithThisItem);
table.SetCurrentCost(weight, currentWeightMaxValue);
}
else
{
table.SetCurrentCost(weight, prevValueForThisWeight);
}
}
private static void ComputeMaxCostForEachWeight(Knapsack knapsack, Item item, KnapsackTable table)
{
for (var weight = 1; weight <= knapsack.TotalWeight; weight++)
{
ComputeMaxCost(item, weight, table);
}
}
