ZAP! Day 10.

[advent-of-code-2019.git] / day10 / common.sh

diff --git a/day10/common.sh b/day10/common.sh
index 86979ed04963febd2e8fb8a3b503d84591801a75..db5c6b9df6a70d4b4434ed628726f0bd15c0cd1d 100644 (file)
--- a/day10/common.sh
+++ b/day10/common.sh
@@ -4,8 +4,8 @@ get_vector() {
     local x2=$3
     local y2=$4
 
-    x_diff=$(($x1 - $x2))
-    y_diff=$(($y1 - $y2))
+    x_diff=$(($x2 - $x1))
+    y_diff=$(($y2 - $y1))
 
     echo "$x_diff,$y_diff"
 }