Initial commit: Days 1 - 5

day01.sql

@@ -0,0 +1,35 @@
+with
+instructions as (
+    select
+        case when line[1] = 'L' then -1 else 1 end as dir,
+        cast(line[2:] as int) as amount,
+        row_number() over () as id
+    from read_csv('data/01.in', header = false) file (line)
+),
+
+positions as (
+    select 50 + sum(dir * amount) over (order by id) as abs_pos
+    from instructions
+),
+
+clicks as (
+    select
+        dir as click,
+        row_number() over (order by id) as click_id
+    from instructions, generate_series(1, amount)
+),
+
+all_positions as (
+    select 50 + sum(click) over (order by click_id) as abs_pos
+    from clicks
+)
+
+select
+    (
+        select count(*) from positions
+        where abs_pos % 100 = 0
+    ) as p1,
+    (
+        select count(*) from all_positions
+        where abs_pos % 100 = 0
+    ) as p2;