/// <summary>
/// Метод поска с возвратом
/// При поиске не добавляются в стек плохие направления
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void branchesAndBoundsAndReturn_Click(object sender, EventArgs e)
{
var count = dataGridView1.Rows.Count;
var sources = new string[count];
var destinations = new string[count];
var prices = new double[count];
var cities = new List <string>();
for (var index = 0; index < count; index++)
{
sources[index] = Convert.ToString(dataGridView1[0, index].EditedFormattedValue);
destinations[index] = Convert.ToString(dataGridView1[1, index].EditedFormattedValue);
prices[index] = Convert.ToDouble(dataGridView1[2, index].EditedFormattedValue);
cities.Add(sources[index]);
cities.Add(destinations[index]);
}
cities = cities.Distinct().ToList();
var stack = new Stack <BranchesAndBoundsPlan>();
var zero = new BranchesAndBoundsPlan();
zero.MinCount = 0;
zero.MaxCount = count;
zero.MinPrice = 0;
zero.MaxPrice = prices.Sum();
stack.Push(zero);
var foundPrice = double.MaxValue;
var foundPlan = zero;
while (stack.Any())
{
var item = stack.Pop();
do
{
if (item.bools.Count == count)
{
var s = new List <string>();
var d = new List <string>();
for (var j = 0; j < count; j++)
{
if (item.bools.ContainsKey(j) && item.bools[j])
{
s.Add(sources[j]);
d.Add(destinations[j]);
}
}
if (item.MaxPrice <= foundPrice && s.Count == cities.Count && IsCyclic(s, d))
{
foundPrice = item.MaxPrice;
foundPlan = item;
}
item = null;
}
else
{
var b = new BranchesAndBoundsPlan();
foreach (var pair in item.bools)
{
b.bools.Add(pair.Key, pair.Value);
}
var index = b.bools.Count;
b.bools.Add(index, true);
b.MaxCount = item.MaxCount;
b.MinCount = item.MinCount + 1;
b.MaxPrice = item.MaxPrice;
b.MinPrice = item.MinPrice + prices[index];
if (b.MaxCount >= cities.Count && b.MinPrice <= foundPrice)
{
stack.Push(b); // отсечение границей
}
index = item.bools.Count;
item.bools.Add(index, false);
item.MaxCount -= 1;
item.MaxPrice -= prices[index];
}
} while (item != null);
}
for (var index = 0; index < count; index++)
{
dataGridView1[3, index].Value = foundPlan.bools[index];
}
UpdateTotal();
SystemSounds.Beep.Play();
}
private void branchesAndBounds_Click(object sender, EventArgs e)
{
var count = dataGridView1.Rows.Count;
var sources = new string[count];
var destinations = new string[count];
var prices = new double[count];
var foundPrice = double.MaxValue;
var cities = new List <string>();
for (var index = 0; index < count; index++)
{
sources[index] = Convert.ToString(dataGridView1[0, index].EditedFormattedValue);
destinations[index] = Convert.ToString(dataGridView1[1, index].EditedFormattedValue);
prices[index] = Convert.ToDouble(dataGridView1[2, index].EditedFormattedValue);
cities.Add(sources[index]);
cities.Add(destinations[index]);
}
cities = cities.Distinct().ToList();
var list = new List <BranchesAndBoundsPlan>();
var list2 = new List <BranchesAndBoundsPlan>();
var zero = new BranchesAndBoundsPlan
{
MinCount = 0,
MinPrice = 0,
MaxCount = dataGridView1.Rows.Count,
MaxPrice = prices.Sum()
};
list.Add(zero);
for (var index = 0; index <= count; index++)
{
var list1 = new List <BranchesAndBoundsPlan>();
foreach (var item in list)
{
var s = new List <string>();
var d = new List <string>();
for (var j = 0; j < count; j++)
{
if (item.bools.ContainsKey(j) && item.bools[j])
{
s.Add(sources[j]);
d.Add(destinations[j]);
}
}
if (s.Count == cities.Count && IsCyclic(s, d))
{
var price = 0.0;
for (var j = 0; j < dataGridView1.Rows.Count; j++)
{
if (item.bools.ContainsKey(j) && item.bools[j])
{
price += prices[j];
}
}
foundPrice = Math.Min(foundPrice, price);
list2.Add(item);
}
else if (index < count)
{
var a = new BranchesAndBoundsPlan();
foreach (var pair in item.bools)
{
a.bools.Add(pair.Key, pair.Value);
}
a.bools.Add(index, false);
a.MaxCount = item.MaxCount - 1;
a.MinCount = item.MinCount;
a.MaxPrice = item.MaxPrice - prices[index];
a.MinPrice = item.MinPrice;
if (a.MaxCount >= cities.Count)
{
list1.Add(a);
}
var b = new BranchesAndBoundsPlan();
foreach (var pair in item.bools)
{
b.bools.Add(pair.Key, pair.Value);
}
b.bools.Add(index, true);
b.MaxCount = item.MaxCount;
b.MinCount = item.MinCount + 1;
b.MaxPrice = item.MaxPrice;
b.MinPrice = item.MinPrice + prices[index];
if (b.MinCount <= cities.Count)
{
list1.Add(b);
}
textBox3.Text += string.Format("Memory: {0} items" + Environment.NewLine, list.Sum(i => 1 + i.bools.Count) + list1.Sum(i => 1 + i.bools.Count));
}
}
list = list1.Where(i => i.MinPrice <= foundPrice).ToList();
textBox3.Text += string.Format("Memory: {0} items" + Environment.NewLine, list.Sum(i => 1 + i.bools.Count));
}
if (!list2.Any())
{
return;
}
var z = list2.First(i => Math.Abs(i.MinPrice - foundPrice) < 0.001);
for (var index = 0; index < dataGridView1.Rows.Count; index++)
{
dataGridView1[3, index].Value = z.bools.ContainsKey(index) && z.bools[index];
}
UpdateTotal();
SystemSounds.Beep.Play();
}
