Lua solutions for week 137

2 files changed, 72 insertions, 0 deletions

diff --git a/challenge-137/abigail/lua/ch-1.lua b/challenge-137/abigail/lua/ch-1.lua
new file mode 100644
index 0000000000..152dca12ca
--- /dev/null
+++ b/challenge-137/abigail/lua/ch-1.lua
@@ -0,0 +1,38 @@
+#!/opt/local/bin/lua
+
+--
+-- See ../README.md
+--
+
+--
+-- Run as: lua ch-1.lua < input-file
+--
+
+local start_years       = {1600, 2000}
+local long_year_offsets = {
+      4,      9,     15,     20,     26,
+     32,     37,     43,     48,     54,
+     60,     65,     71,     76,     82,
+     88,     93,     99,            
+            105,    111,    116,    122,
+    128,    133,    139,    144,    150,
+    156,    161,    167,    172,    178,
+    184,    189,    195,            
+            201,    207,    212,    218,
+    224,    229,    235,    240,    246,
+    252,    257,    263,    268,    274,
+    280,    285,    291,    296,    
+                    303,    308,    314,
+    320,    325,    331,    336,    342,
+    348,    353,    359,    364,    370,
+    376,    381,    387,    392,    398
+}
+
+for i = 1, #start_years do
+    for j = 1, #long_year_offsets do
+        local year = start_years [i] + long_year_offsets [j]
+        if 1900 <= year and year <= 2100 then
+            print (year)
+        end
+    end
+end
diff --git a/challenge-137/abigail/lua/ch-2.lua b/challenge-137/abigail/lua/ch-2.lua
new file mode 100644
index 0000000000..1cfb4f84e9
--- /dev/null
+++ b/challenge-137/abigail/lua/ch-2.lua
@@ -0,0 +1,34 @@
+#!/opt/local/bin/lua
+
+--
+-- See ../README.md
+--
+
+--
+-- Run as: lua ch-2.lua < input-file
+--
+
+function reverse (num)
+    local rev = 0
+    while num > 0 do
+        rev = rev * 10
+        rev = rev + (num % 10)
+        num = math . floor (num / 10)
+    end
+    return (rev)
+end
+
+
+function ly (n)
+    if     n >= 10000000
+    then   return (1)
+    elseif n == reverse (n)
+    then   return (0)
+    else   return (ly (n + reverse (n)))
+    end
+end
+
+
+for number in io . lines () do
+    print (ly (tonumber (number)))
+end