我对此进行了一些尝试,这就是我到目前为止所得到的,应该是一个很好的起点。我随机生成了一个黄金和铁对列表(我使用了 Point,因为它对我来说更简单,但任何东西都可以。)
我们的想法是取出一组价值较小的黄金,然后将它们与另一个列表中的一个较大价值的黄金进行交换。在大多数情况下,这会说等量的黄金,但是用较小的铁交换价值较大的铁。
private void button2_Click(object sender, EventArgs e)
{
var GoldIron = new List<Point>(
new Point[]{
new Point(16,23),new Point(16,28),new Point(19,44),new Point(21,29),
new Point(23,16),new Point(24,82),new Point(27,85),new Point(31,63),
new Point(31,78),new Point(32,65),new Point(41,23),new Point(43,79),
new Point(44,76),new Point(45,23),new Point(47,16),new Point(50,15),
new Point(50,37),new Point(52,28),new Point(52,58),new Point(52,71),
new Point(61,39),new Point(61,75),new Point(63,59),new Point(68,25),
new Point(68,61),new Point(70,24),new Point(71,75),new Point(74,78),
new Point(77,59),new Point(82,27)}
);
listBox1.DataSource = GoldIron;
//Split into 2 lists based on the gold amount
var Left = new List<Point>();
var Right = new List<Point>();
var SumGold = GoldIron.Sum(P => P.X);
var SumIron = GoldIron.Sum(P => P.Y);
label2.Text = SumGold.ToString();
label1.Text = SumIron.ToString();
var LeftGold = 0;
Int32 i = 0;
while (LeftGold < SumGold / 2)
{
LeftGold += GoldIron[i].X;
Left.Add(GoldIron[i++]);
}
while (i < GoldIron.Count)
{
Right.Add(GoldIron[i++]);
}
Int32 LIndex = 0;
//Start Algorithm
Int32 LeftIron = Left.Sum(P => P.Y);
Int32 RightIron = Right.Sum(P => P.Y);
while (LeftIron - RightIron > 50 || RightIron - LeftIron > 50)
{
if (LeftIron < RightIron)
{
List<Point> TempList = Left;
Left = Right;
Right = TempList;
LIndex = 0;
}
Int32 SmallestRight = Right[LIndex].X;
LeftGold = 0;
i = 0;
while (LeftGold < SmallestRight)
{
LeftGold += Right[i++].X;
}
Point Temp = Right[LIndex];
Right.RemoveAt(LIndex);
Right.AddRange(Left.Take(i));
Left.RemoveRange(0, i);
Left.Add(Temp);
LIndex += i;
//Sort
Left.Sort(CompareGold);
Right.Sort(CompareGold);
LeftIron = Left.Sum(P => P.Y);
RightIron = Right.Sum(P => P.Y);
}
listBox2.DataSource = Left;
SumGold = Left.Sum(P => P.X);
SumIron = Left.Sum(P => P.Y);
label4.Text = SumGold.ToString();
label3.Text = SumIron.ToString();
listBox3.DataSource = Right;
SumGold = Right.Sum(P => P.X);
SumIron = Right.Sum(P => P.Y);
label6.Text = SumGold.ToString();
label5.Text = SumIron.ToString();
}
结果: