Observations
For a length of 2N $ $ repeating the sequence of operations: Remove and two different adjacent elements. Finally, the sequence can be emptied of the charge condition occurrences exceeds $ N $ element does not exist in the sequence.
For a length of 2N $ $ repeating the sequence of operations: Remove and two different adjacent elements. Finally, the sequence can be emptied of the charge condition occurrences exceeds $ N $ element does not exist in the sequence.