public List <int> Run(Backpack backpack, ref double sumCost)
{
sumCost = 0;
BackpackInfo result = new BackpackInfo()
{
SelectedItems = new List <bool>(),
SummCost = 0,
SummMass = 0
};
BackpackInfo startBackpackInfo = new BackpackInfo()
{
SelectedItems = new List <bool>(),
SummCost = 0,
SummMass = 0
};
Rec(backpack, startBackpackInfo, ref result);
List <int> resultNums = new List <int>();
for (int i = 0; i < result.SelectedItems.Count; i++)
{
if (result.SelectedItems[i])
{
sumCost += backpack.Items[i].Cost;
resultNums.Add(backpack.Items[i].Num);
}
}
return(resultNums);
}
public List <int> Run(Backpack backpack, ref double sumCost)
{
sumCost = 0;
BackpackInfo result = new BackpackInfo()
{
Items = new List <bool>(),
SummCost = 0,
SummMass = 0
};
long maxIter = (long)Math.Pow(2, backpack.Items.Count);
BinMask binMask = new BinMask(backpack.Items.Count);
for (long i = 0; i < maxIter; i++)
{
BackpackInfo curBackpack = new BackpackInfo()
{
Items = new List <bool>(),
SummCost = 0,
SummMass = 0
};
for (int j = 0; j < binMask.Mask.Count; j++)
{
curBackpack.Items.Add(binMask.Mask[j]);
if (binMask.Mask[j])
{
curBackpack.SummCost += backpack.Items[j].Cost;
curBackpack.SummMass += backpack.Items[j].Mass;
}
}
binMask++;
if (curBackpack.SummMass <= backpack.MaxMass && curBackpack.SummCost > result.SummCost)
{
result = curBackpack;
}
}
List <int> resultNums = new List <int>();
for (int i = 0; i < result.Items.Count; i++)
{
if (result.Items[i])
{
sumCost += backpack.Items[i].Cost;
resultNums.Add(backpack.Items[i].Num);
}
}
return(resultNums);
}
private void Rec(Backpack backpack, BackpackInfo curBackpack, ref BackpackInfo bestBackpack)
{
if (curBackpack.SelectedItems.Count == backpack.Items.Count)
{
if (curBackpack.SummCost > bestBackpack.SummCost && curBackpack.SummMass <= backpack.MaxMass)
{
bestBackpack = curBackpack.Copy();
}
}
else
{
int indexCurItem = curBackpack.SelectedItems.Count;
BackpackInfo unselectItem = curBackpack.Copy();
unselectItem.SelectedItems.Add(false);
Rec(backpack, unselectItem, ref bestBackpack);
BackpackInfo selectItem = curBackpack.Copy();
selectItem.SelectedItems.Add(true);
selectItem.SummCost += backpack.Items[indexCurItem].Cost;
selectItem.SummMass += backpack.Items[indexCurItem].Mass;
Rec(backpack, selectItem, ref bestBackpack);
}
}
