static void Main(string[] args)
{
int[] nums = ParseToInt(Console.ReadLine().Split());
int n = nums[0];
int m = nums[1];
Queue <SequenceNtoM> items = new Queue <SequenceNtoM>();
items.Enqueue(new SequenceNtoM(n, null));
while (items.Count > 0)
{
SequenceNtoM currentItem = items.Dequeue();
if (currentItem.Value < m)
{
items.Enqueue(new SequenceNtoM(currentItem.Value + 1, currentItem));
items.Enqueue(new SequenceNtoM(currentItem.Value + 2, currentItem));
items.Enqueue(new SequenceNtoM(currentItem.Value * 2, currentItem));
}
if (currentItem.Value == m)
{
PrintSolution(currentItem);
break;
}
}
}
private static void PrintSolution(SequenceNtoM item)
{
Stack <int> output = new Stack <int>();
while (item != null)
{
output.Push(item.Value);
item = item.PreviousItem;
}
Console.WriteLine(string.Join(" -> ", output));
}
public SequenceNtoM(int value, SequenceNtoM previousItem)
{
this.Value = value;
this.PreviousItem = previousItem;
}
