From 7d8df0db21dbbda1a38ad9d69ae5624875a66aa4 Mon Sep 17 00:00:00 2001
From: Maximilian Friedersdorff <max@gwairfelin.com>
Date: Sun, 7 Dec 2025 20:27:32 +0000
Subject: [PATCH] Half assed start at seven

---
 2025/seven/seven.go | 70 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 2025/seven/seven.go

diff --git a/2025/seven/seven.go b/2025/seven/seven.go
new file mode 100644
index 0000000..c849bc9
--- /dev/null
+++ b/2025/seven/seven.go
@@ -0,0 +1,70 @@
+package main
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func check(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+type beam int
+type beams struct {
+	b map[beam]struct{}
+}
+
+func (b *beams) add(pos beam) {
+	b.b[pos] = {}
+}
+
+func main() {
+
+	file, err := os.Open("five.txt")
+	check(err)
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	scanner.Scan()
+
+	text := scanner.Text()
+
+	start := strings.IndexRune(text, 'S')
+	beams.add(beam(start))
+
+	for scanner.Scan() {
+	}
+	db, err := parse(scanner)
+
+	check(err)
+
+	nRaw := len(db.ranges)
+
+	for {
+		before, after := db.collapse()
+
+		fmt.Printf("Collapsed %d to %d ranges\n", before, after)
+
+		if before == after {
+			break
+		}
+	}
+
+	potentialNFresh := 0
+	for _, r := range db.ranges {
+		potentialNFresh += r.nInRange()
+	}
+
+	fmt.Printf(
+		"N raw %d and consolidated %d. %d potential fresh ingredients.\n",
+		nRaw,
+		len(db.ranges),
+		potentialNFresh,
+	)
+}