public static string Task23_1(string input, int turns)
{
var head = new LLNode <int>(int.Parse(input[0].ToString()));
var cur = head;
var maxValue = head.Data;
var dict = new Dictionary <int, LLNode <int> > {
{ head.Data, head }
};
for (int i = 1; i < input.Length; i++)
{
var newOne = new LLNode <int>(int.Parse(input[i].ToString()));
cur.Next = newOne;
cur = newOne;
if (newOne.Data > maxValue)
{
maxValue = newOne.Data;
}
dict.Add(newOne.Data, newOne);
}
cur.Next = head;
cur = head;
for (int i = 0; i < turns; i++)
{
var pickUpHead = cur.Next;
var pickUpTail = pickUpHead.Next.Next;
var pickUpValues = new HashSet <int> {
pickUpHead.Data, pickUpHead.Next.Data, pickUpTail.Data
};
var destVal = cur.Data - 1;
while (pickUpValues.Contains(destVal) || destVal == 0)
{
destVal--;
if (destVal <= 0)
{
destVal = maxValue;
}
}
var destNode = dict[destVal];
cur.Next = pickUpTail.Next;
var temp = destNode.Next;
destNode.Next = pickUpHead;
pickUpTail.Next = temp;
cur = cur.Next;
}
var answer = String.Empty;
cur = dict[1].Next;
while (cur != dict[1])
{
answer = $"{answer}{cur.Data}";
cur = cur.Next;
}
return(answer);
}