From 0b77fc6bf3bf4c1d0fdb32e324c5db064c639902 Mon Sep 17 00:00:00 2001
From: Der Chien <b03902015@ntu.edu.tw>
Date: Wed, 28 Dec 2022 22:39:52 +0800
Subject: [PATCH] 20221228 revert the points length check

---
 src/exercises/day-2/points-polygons.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/exercises/day-2/points-polygons.rs b/src/exercises/day-2/points-polygons.rs
index 2f1148c8..0d7c1d23 100644
--- a/src/exercises/day-2/points-polygons.rs
+++ b/src/exercises/day-2/points-polygons.rs
@@ -84,8 +84,8 @@ impl Polygon {
     }
 
     pub fn length(&self) -> f64 {
-        if self.points.len() < 3 {
-            return f64::NAN;
+        if self.points.is_empty() {
+            return 0.0;
         }
 
         let mut result = 0.0;