1 files changed, 24 insertions, 0 deletions
diff --git a/challenge-160/deadmarshal/lua/ch-2.lua b/challenge-160/deadmarshal/lua/ch-2.lua
new file mode 100644
index 0000000000..9682d9c617
--- /dev/null
+++ b/challenge-160/deadmarshal/lua/ch-2.lua
@@ -0,0 +1,24 @@
+function array_sum(t)
+   assert(type(t) == "table", "t must be a table!")
+   local sum = 0
+   for i=1, #t do sum = sum + t[i] end
+   return sum
+end
+
+function equilibrium_index(t)
+   assert(type(t) == "table", "t must be a table!")
+   local left, right, ret = 0, array_sum(t), -1
+   for i,j in pairs(t) do
+      right = right - j
+      if left == right then
+	 ret = i
+	 break
+      end
+      left = left + j
+   end
+   return ret
+end
+
+print(equilibrium_index({1,3,5,7,9}))
+print(equilibrium_index({1,2,3,4,5}))
+print(equilibrium_index({2,4,2}))