From fb03972f0dc6752580707a5c1897f3501721aa2b Mon Sep 17 00:00:00 2001
From: artfintl <35037140+artfintl@users.noreply.github.com>
Date: Thu, 18 Feb 2021 16:09:04 +0800
Subject: [PATCH] Update 100_Numpy_exercises_with_solutions.md

---
 100_Numpy_exercises_with_solutions.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/100_Numpy_exercises_with_solutions.md b/100_Numpy_exercises_with_solutions.md
index 95a4cdc..12c658a 100644
--- a/100_Numpy_exercises_with_solutions.md
+++ b/100_Numpy_exercises_with_solutions.md
@@ -682,6 +682,7 @@ print(F)
 
 w,h = 16,16
 I = np.random.randint(0,2,(h,w,3)).astype(np.ubyte)
+# The parenthesis around 256*256 ensure the dtpye promoted to uint32 properly.Otherwise the first term will overflow.
 F = I[...,0]*(256*256) + I[...,1]*256 +I[...,2]
 n = len(np.unique(F))
 print(np.unique(I))