Fixed a serious typo in lecture 2

Author: caranha

Week02/20_NonLinearDS.tex

@@ -70,8 +70,8 @@ \subsection{Sets and Maps}
     \begin{itemize}
       \item {\bf unordered\_set}: Store unique keys. Search/Insert/Delete in $O(1)$, no order.
       \item {\bf unordered\_map}: Store key/data, Search/Insert/Delete in $O(1)$, no order.
-      \item {\bf set}: Store unique keys. Search/Insert/Delete in $O(1)$.
-      \item {\bf map}: Store key/data, Search/Insert/Delete in $O(1)$.
+      \item {\bf set}: Store unique keys. Search/Insert/Delete in $O(\log n)$.
+      \item {\bf map}: Store key/data, Search/Insert/Delete in $O(\log n)$.
     \end{itemize}
   \end{block}
 \end{frame}
@@ -134,6 +134,6 @@ \subsection{Sets and Maps}
 \url{https://github.com/stevenhalim/cpbook-code/blob/master/ch2/nonlineards/map_set.cpp}
 \end{block}
 
-Visualization of Data Structures: 
+Visualization of Data Structures:
 \url{https://visualgo.net/}
 \end{frame}