public long GetValue()
{
switch (Type)
{
case PacketType.Sum:
return(SubPackets.Sum(i => i.GetValue()));
case PacketType.Product:
return(SubPackets.Select(i => i.GetValue()).Aggregate((total, next) => total * next));
case PacketType.Minimum:
return(SubPackets.Min(i => i.GetValue()));
case PacketType.Maximum:
return(SubPackets.Max(i => i.GetValue()));
case PacketType.Literal:
return(LiteralValue.Value);
case PacketType.GreaterThan:
if (SubPackets[0].GetValue() > SubPackets[1].GetValue())
{
return(1);
}
return(0);
case PacketType.SmallerThan:
if (SubPackets[0].GetValue() < SubPackets[1].GetValue())
{
return(1);
}
return(0);
case PacketType.EqualTo:
if (SubPackets[0].GetValue() == SubPackets[1].GetValue())
{
return(1);
}
return(0);
}
throw new Exception("Unsupported type");
}
public int SumVersion()
{
return(SubPackets.Sum(i => i.SumVersion()) + Version);
}
public Packet(String input)
{
_input = input;
Version = Convert.ToInt32(_input.Substring(0, 3), 2);
TypeID = Convert.ToInt32(_input.Substring(3, 3), 2);
if (TypeID == 4)
{
var cursor = 6;
var nextGroup = _input.Substring(cursor, 5);
var decimalValue = "";
while (nextGroup != null)
{
decimalValue += nextGroup.Substring(1);
cursor += 5;
if (nextGroup.Substring(0, 1) == "1")
{
nextGroup = _input.Substring(cursor, 5);
}
else
{
nextGroup = null;
}
}
Value = Convert.ToInt64(decimalValue, 2);
Length = cursor;
return;
}
else
{
LengthType = Convert.ToInt32(_input.Substring(6, 1));
if (LengthType == 0)
{
var subPackagesLenght = Convert.ToInt32(_input.Substring(7, 15), 2);
var cursor = 22;
var init_index = cursor;
while (cursor < init_index + subPackagesLenght)
{
var packet = new Packet(_input.Substring(cursor, _input.Length - cursor));
cursor += packet.Length;
SubPackets.Add(packet);
}
Length = cursor;
}
else
{
var numberOfSubPackets = Convert.ToInt32(_input.Substring(7, 11), 2);
var cursor = 18;
for (int i = 0; i < numberOfSubPackets; i++)
{
var packet = new Packet(_input.Substring(cursor, _input.Length - cursor));
cursor += packet.Length;
SubPackets.Add(packet);
}
Length = cursor;
}
}
if (TypeID == 0)
{
Value = SubPackets.Select(x => x.Value).Sum();
}
else if (TypeID == 1)
{
Value = SubPackets.Select(x => x.Value).Aggregate((x, y) => x * y);
}
else if (TypeID == 2)
{
Value = SubPackets.Select(x => x.Value).Min();
}
else if (TypeID == 3)
{
Value = SubPackets.Select(x => x.Value).Max();
}
else if (TypeID == 5)
{
Value = (SubPackets[0].Value > SubPackets[1].Value) ? 1 : 0;
}
else if (TypeID == 6)
{
Value = (SubPackets[0].Value < SubPackets[1].Value) ? 1 : 0;
}
else if (TypeID == 7)
{
Value = (SubPackets[0].Value == SubPackets[1].Value) ? 1 : 0;
}
}