From c94cdf33f2aaba58333891765fea7206d1a028fa Mon Sep 17 00:00:00 2001
From: Antti H S Laaksonen <ahslaaks@cs.helsinki.fi>
Date: Sun, 10 Dec 2017 11:17:12 +0200
Subject: [PATCH] Add a note about empty subarray sum [closes #58]

---
 chapter02.tex | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/chapter02.tex b/chapter02.tex
index 5e33945..98b36c6 100644
--- a/chapter02.tex
+++ b/chapter02.tex
@@ -401,6 +401,9 @@ the following subarray produces the maximum sum $10$:
 \end{center}
 \end{samepage}
 
+We assume that an empty subarray is allowed,
+so the maximum subarray sum is always at least $0$.
+
 \subsubsection{Algorithm 1}
 
 A straightforward way to solve the problem