Merge remote-tracking branch 'upstream/master'

1 files changed, 29 insertions, 0 deletions

diff --git a/challenge-152/abigail/lua/ch-2.lua b/challenge-152/abigail/lua/ch-2.lua
new file mode 100644
index 0000000000..d7a0f6f594
--- /dev/null
+++ b/challenge-152/abigail/lua/ch-2.lua
@@ -0,0 +1,29 @@
+#!/opt/local/bin/lua
+
+--
+-- See https://theweeklychallenge.org/blog/perl-weekly-challenge-152
+--
+
+--
+-- Run as: lua ch-2.lua < input-file
+--
+
+local i_pat = "(-?%d+)"
+local pattern = i_pat
+for i = 2, 8 do
+    pattern = pattern .. "%s+" .. i_pat
+end
+
+for line in io . lines () do
+    local _, _, a_x1, a_y1, a_x2, a_y2, b_x1, b_y1, b_x2, b_y2 =
+               line : find (pattern)
+    print (               (math . max (a_x1, a_x2) - math . min (a_x1, a_x2))  *
+                          (math . max (a_y1, a_y2) - math . min (a_y1, a_y2))  +
+                          (math . max (b_x1, b_x2) - math . min (b_x1, b_x2))  *
+                          (math . max (b_y1, b_y2) - math . min (b_y1, b_y2))  -
+math . max (0, math . min (math . max (a_x1, a_x2),  math . max (b_x1, b_x2))  -
+               math . max (math . min (a_x1, a_x2),  math . min (b_x1, b_x2))) *
+math . max (0, math . min (math . max (a_y1, a_y2),  math . max (b_y1, b_y2))  -
+               math . max (math . min (a_y1, a_y2),  math . min (b_y1, b_y2))))
+
+end