Update exam/packet.tex

exam/packet.tex

@@ -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 \#.
@@ -166,23 +167,23 @@ You are given a string S composed of only the characters ‘6', ‘7’, ‘A',
 
 \examples
 \begin{verbatim}
-Input 1:
+    Input 1:
-67A6
+    67A6
 
-Output 1:
+    Output 1:
-6
+    6
 
-Input 2:
+    Input 2:
-66B7
+    66B7
 
-Output 2:
+    Output 2:
-666
+    666
 
-Input 3:
+    Input 3:
-7A7#
+    7A7#
 
-Output 3:
+    Output 3:
-EMPTY
+    EMPTY
 \end{verbatim}
 
 % ========================= Problem 7 =========================
@@ -212,30 +213,30 @@ Your task is to determine if there exists any valid path from (1,1) to (N,M) obe
 
 \examples
 \begin{verbatim}
-Input 1:
+    Input 1:
-2 2
+    2 2
-66
+    66
-67
+    67
 
-Output 1:
+    Output 1:
-Sixxx sevennn
+    Sixxx sevennn
 
-Input 2:
+    Input 2:
-2 2
+    2 2
-77
+    77
-77
+    77
 
-Output 2:
+    Output 2:
-Six was afraid of seven after all
+    Six was afraid of seven after all
 
-Input 3:
+    Input 3:
-3 3
+    3 3
-666
+    666
-676
+    676
-666
+    666
 
-Output 3:
+    Output 3:
-Sixxx sevennn
+    Sixxx sevennn
 \end{verbatim}
 
 % ========================= Problem 8 =========================
@@ -258,38 +259,38 @@ There is a staircase with N steps. Each step is labelled with a 6 or a 7. Simon
 
 \examples
 \begin{verbatim}
-Input 1:
+    Input 1:
-5
+    5
-66766
+    66766
 
-Output 1:
+    Output 1:
-3
+    3
 
-Explanation 1:
+    Explanation 1:
-Case 1: Step 1->2->3->4->5
+    Case 1: Step 1->2->3->4->5
-Case 2: Step 1->2->4->5
+    Case 2: Step 1->2->4->5
-Case 3: Step 1->3->4->5
+    Case 3: Step 1->3->4->5
 
-Input 2:
+    Input 2:
-3
+    3
-677
+    677
 
-Output 2:
+    Output 2:
-2
+    2
 
-Explanation 2:
+    Explanation 2:
-Case 1: 1->2->3
+    Case 1: 1->2->3
-Case 2: 1->3
+    Case 2: 1->3
 
-Input 3:
+    Input 3:
-1
+    1
-6
+    6
 
-Output 3:
+    Output 3:
-1
+    1
 
-Explanation 3:
+    Explanation 3:
-There is only one way to get to the top (which Simon is already at).
+    There is only one way to get to the top (which Simon is already at).
 \end{verbatim}
 \end{document}