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diff --git a/samples/aoc/2017/01/solve.bruijn b/samples/aoc/2017/01/solve.bruijn
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+:import std/Combinator .
+:import std/String .
+:import std/Number .
+:import std/Char C
+:import std/Pair P
+
+self [[((zip 0) ∘ (drop 1) ∘ cycle) 0]] ⧗ Number → (List Number) → (List (Pair Number Number))
+
+part1 sum ∘ eqs ∘ pairs
+	sum foldl [[^0 + 1]] (+0)
+	eqs filter (P.uncurry …=?…)
+	pairs self (+1)
+
+part2 [(sum ∘ eqs ∘ pairs) 0]
+	sum foldl [[^0 + 1]] (+0)
+	eqs filter (P.uncurry …=?…)
+	pairs self /²(length 0)
+
+:test (part1 ((+1) : ((+1) : ((+2) : {}(+2))))) ((+3))
+
+main [parts nums]
+	nums C.number! <$> ^(lines 0)
+	parts [(part1 0) : (part2 0)]