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-rw-r--r--challenge-241/deadmarshal/lua/ch-1.lua19
1 files changed, 19 insertions, 0 deletions
diff --git a/challenge-241/deadmarshal/lua/ch-1.lua b/challenge-241/deadmarshal/lua/ch-1.lua
new file mode 100644
index 0000000000..a63054cda6
--- /dev/null
+++ b/challenge-241/deadmarshal/lua/ch-1.lua
@@ -0,0 +1,19 @@
+#!/usr/bin/env lua
+
+local function arithmetic_triplets(t,diff)
+ local count = 0
+ for i=1,#t do
+ for j=i+1,#t do
+ for k=j+1,#t do
+ if t[j] - t[i] == diff and t[k] - t[j] == diff then
+ count = count + 1
+ end
+ end
+ end
+ end
+ return count
+end
+
+print(arithmetic_triplets({0,1,4,6,7,10},3))
+print(arithmetic_triplets({4,5,6,7,8,9},2))
+