From e7c9108b95e39d7ea5a29ae06d619c4727f11027 Mon Sep 17 00:00:00 2001 From: Thomas Voss Date: Fri, 29 Oct 2021 23:02:39 +0200 Subject: Initial commit --- 2020/03/puzzle-2.awk | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100755 2020/03/puzzle-2.awk (limited to '2020/03/puzzle-2.awk') diff --git a/2020/03/puzzle-2.awk b/2020/03/puzzle-2.awk new file mode 100755 index 0000000..88e0625 --- /dev/null +++ b/2020/03/puzzle-2.awk @@ -0,0 +1,36 @@ +#!/usr/bin/env -S awk -f + +BEGIN { + slope[1] = 1 + slope[2] = 1 + slope[3] = 1 + slope[4] = 1 + slope[5] = 1 +} + +{ + len = split($0, obs, "") + + right = 1 + for (i = 1; i < 5; i++) { + if (slope[i] > len) + slope[i] -= len + + if (obs[slope[i]] == "#") + count[i]++ + + slope[i] += right + right += 2 + } + + # Specific code for slope 5 + if (NR % 2 == 1) { + if (slope[5] > len) + slope[5] -= len + + if (obs[slope[5]++] == "#") + count[5]++ + } +} + +END { print count[1] * count[2] * count[3] * count[4] * count[5] } -- cgit v1.2.3