From 92f9c9b1b5dfaf5a34cd5130f1f05b0c619f534f Mon Sep 17 00:00:00 2001
From: Annwan <annwan@annwan.me>
Date: Sat, 2 Dec 2023 16:41:43 +0100
Subject: [PATCH] Day 2, awk

---
 day2.awk | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 day2.awk

diff --git a/day2.awk b/day2.awk
new file mode 100644
index 0000000..9d5499a
--- /dev/null
+++ b/day2.awk
@@ -0,0 +1,40 @@
+BEGIN {
+    FS = ":"
+    maxred = 12;
+    maxgreen = 13;
+    maxblue = 14;
+}
+{
+    gamenum = substr($1, 6)
+    split($2, games, ";");
+    valid = 1;
+    minred = 0;
+    minblue = 0;
+    mingreen = 1;
+    for (i = 1; i <= length(games); i++) {
+        split(games[i], game, ",");
+        usedblue = 0;
+        usedred =  0;
+        usedgreen = 0;
+        
+        for (j = 1; j <= length(game); j++) {
+            split(game[j], value, " ")
+            if (value[2] == "blue")
+                usedblue = usedblue + value[1];
+            else if (value[2] == "red")
+                usedred = usedred + value[1];
+            else if (value[2] == "green")
+                usedgreen = usedgreen + value[1];
+            else 
+                print "Unknown color in `", game[j], "`";
+        }
+        if (usedblue > minblue) minblue = usedblue;
+        if (usedred > minred) minred = usedred;
+        if (usedgreen > mingreen) mingreen = usedgreen;
+        valid = valid && usedred <= maxred && usedblue <= maxblue && usedgreen <= maxgreen;
+    }
+    if (valid)
+        sum1 = sum1 + gamenum;
+    sum2 = sum2 + (minred * mingreen * minblue);
+}
+END { print sum1, sum2; }