Initial commit: Days 1 - 5

day05.sql

@@ -0,0 +1,64 @@
+with recursive
+
+raw (line) as (
+    select * from read_csv('data/05.in', header = false)
+),
+
+ranges (low, high) as (
+    select
+        cast(spl[1] as int64),
+        cast(spl[2] as int64)
+    from (
+        select split(line, '-') as spl
+        from raw
+        where contains(line, '-')
+    )
+),
+
+ingredients (id) as (
+    select cast(line as int64)
+    from raw
+    where line <> '' and not contains(line, '-')
+),
+
+part1 (solution) as (
+    select count(*) from ingredients
+    where exists (
+        select
+            low,
+            high
+        from ranges
+        where id between low and high
+    )
+),
+
+merged (low, high) as (
+    select * from ranges
+
+    union
+
+    select
+        r1.low,
+        case when r1.high < r2.high then r2.high else r1.high end
+    from merged r1, merged r2
+    where
+        (r1.low < r2.low or (r1.low = r2.low and r1.high < r2.high))
+        and not r1.high < r2.low and not r2.high < r1.low
+),
+
+part2 (solution) as (
+    select sum(m1.high - m1.low + 1) from merged m1
+    where not exists (
+        select *
+        from merged m2
+        where
+            (m1.high <> m2.high or m1.low <> m2.low)
+            and m1.high <= m2.high
+            and m1.low >= m2.low
+    )
+)
+
+select
+    part1.solution,
+    part2.solution
+from part1, part2