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Update exam/packet.tex

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problsolv
2025-11-27 20:51:52 -06:00
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commit 2f25f1bfe3
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exam/packet.tex
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@@ -145,15 +145,16 @@ Output:
% ========================= Problem 6 =========================
\problem{Problem 6(.7): Sequencing}
\textit{Difficulty: Easy}
\begin{itemize}
You are given a string S composed of only the characters ‘6', ‘7’, ‘A', ‘B', and ‘\#' (without the quotation marks). This string is processed from left to right, and you must maintain a sequence of chracters that changes according to these rules:
You are given a string S composed of only the characters 6, 7, A, B, and \# (without the quotation marks). This string is processed from left to right, and you must maintain a sequence of chracters that changes according to these rules:
\begin{itemize}
\item 6 - add a 6 to the end of the sequence
\item 7 - if the sequence is non-empty and its last chracter is ‘6', remove that last ‘6', otherwise, add ‘7' to the end of the sequence
\item 7 - if the sequence's last chracter is 6, remove that last 6, otherwise, add 7 to the end of the sequence
\item A - reverse the sequence
\item B - add a duplicate of the current sequence to the end of it
\item \# - clear the sequence
\end{itemize}
\inputformat
\begin{itemize}
\item The first line consists of the string S. The string consists only of the characters 6, 7, A, B, and \#.