2023 Day 1 Complete

2023/day01/main.go

@@ -0,0 +1,97 @@
+package main
+
+import (
+	"fmt"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+func main() {
+	inp := h.StdinToStringSlice()
+	part1(inp)
+	part2(inp)
+}
+
+func part1(input []string) {
+	var value int
+	for _, i := range input {
+		value = value + getValue(i, false)
+	}
+	fmt.Println("# Part 1")
+	fmt.Println(value)
+}
+
+var nums = []string{
+	"zero",
+	"one",
+	"two",
+	"three",
+	"four",
+	"five",
+	"six",
+	"seven",
+	"eight",
+	"nine",
+}
+
+func part2(input []string) {
+	var value int
+	for _, i := range input {
+		value = value + getValue(i, true)
+	}
+	fmt.Println("# Part 2")
+	fmt.Println(value)
+}
+
+func getValue(wrk string, p2 bool) int {
+	return (getFirstValue(wrk, p2) * 10) + getLastValue(wrk, p2)
+}
+func getFirstValue(wrk string, p2 bool) int {
+	for j := 0; j < len(wrk); j++ {
+		if p2 {
+			v := numStringAt(wrk, j)
+			if v > -1 {
+				return v
+			}
+		}
+		if wrk[j]-'0' >= 0 && wrk[j]-'0' <= 9 {
+			return int(wrk[j] - '0')
+		}
+	}
+	return 0
+}
+func getLastValue(wrk string, p2 bool) int {
+	for j := len(wrk) - 1; j >= 0; j-- {
+		if p2 {
+			v := numStringAt(wrk, j)
+			if v > -1 {
+				return v
+			}
+		}
+		if wrk[j]-'0' >= 0 && wrk[j]-'0' <= 9 {
+			return int(wrk[j] - '0')
+		}
+	}
+	return 0
+}
+
+func numStringAt(haystack string, pos int) int {
+	for i := range nums {
+		if stringAt(haystack, pos, nums[i]) {
+			return i
+		}
+	}
+	return -1
+}
+
+func stringAt(haystack string, pos int, needle string) bool {
+	if len(haystack) < pos+len(needle) {
+		return false
+	}
+	for i := range needle {
+		if haystack[pos+i] != needle[i] {
+			return false
+		}
+	}
+	return true
+}

2023/day01/problem

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+Advent of Code
+
+br0xen (AoC++) 2*
+
+--- Day 1: Trebuchet?! ---
+
+   Something is wrong with global snow production, and you've been selected to take a look. The Elves have even given you a map; on it, they've used stars to
+   mark the top fifty locations that are likely to be having problems.
+
+   You've been doing this long enough to know that to restore snow operations, you need to check all fifty stars by December 25th.
+
+   Collect stars by solving puzzles. Two puzzles will be made available on each day in the Advent calendar; the second puzzle is unlocked when you complete the
+   first. Each puzzle grants one star. Good luck!
+
+   You try to ask why they can't just use a weather machine ("not powerful enough") and where they're even sending you ("the sky") and why your map looks
+   mostly blank ("you sure ask a lot of questions") and hang on did you just say the sky ("of course, where do you think snow comes from") when you realize
+   that the Elves are already loading you into a trebuchet ("please hold still, we need to strap you in").
+
+   As they're making the final adjustments, they discover that their calibration document (your puzzle input) has been amended by a very young Elf who was
+   apparently just excited to show off her art skills. Consequently, the Elves are having trouble reading the values on the document.
+
+   The newly-improved calibration document consists of lines of text; each line originally contained a specific calibration value that the Elves now need to
+   recover. On each line, the calibration value can be found by combining the first digit and the last digit (in that order) to form a single two-digit number.
+
+   For example:
+
+ 1abc2
+ pqr3stu8vwx
+ a1b2c3d4e5f
+ treb7uchet
+
+   In this example, the calibration values of these four lines are 12, 38, 15, and 77. Adding these together produces 142.
+
+   Consider your entire calibration document. What is the sum of all of the calibration values?
+
+   Your puzzle answer was 55029.
+
+--- Part Two ---
+
+   Your calculation isn't quite right. It looks like some of the digits are actually spelled out with letters: one, two, three, four, five, six, seven, eight,
+   and nine also count as valid "digits".
+
+   Equipped with this new information, you now need to find the real first and last digit on each line. For example:
+
+ two1nine
+ eightwothree
+ abcone2threexyz
+ xtwone3four
+ 4nineeightseven2
+ zoneight234
+ 7pqrstsixteen
+
+   In this example, the calibration values are 29, 83, 13, 24, 42, 14, and 76. Adding these together produces 281.
+
+   What is the sum of all of the calibration values?
+
+   Your puzzle answer was 55686.
+
+   Both parts of this puzzle are complete! They provide two gold stars: **
+
+   At this point, you should return to your Advent calendar and try another puzzle.
+
+   If you still want to see it, you can get your puzzle input.
+
+References
+
+   Visible links
+   . https://adventofcode.com/
+   . https://adventofcode.com/2023/about
+   . https://adventofcode.com/2023/events
+   . https://teespring.com/stores/advent-of-code
+   . https://adventofcode.com/2023/settings
+   . https://adventofcode.com/2023/auth/logout
+   . Advent of Code Supporter
+	https://adventofcode.com/2023/support
+   . https://adventofcode.com/2023
+   . https://adventofcode.com/2023
+   . https://adventofcode.com/2023/support
+   . https://adventofcode.com/2023/sponsors
+   . https://adventofcode.com/2023/leaderboard
+   . https://adventofcode.com/2023/stats
+   . https://adventofcode.com/2023/sponsors
+   . https://adventofcode.com/2015/day/1
+   . https://en.wikipedia.org/wiki/Trebuchet
+   . https://adventofcode.com/2023
+   . https://adventofcode.com/2023/day/1/input

2023/day01/testinput

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+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet

2023/day01/testinput2

@@ -0,0 +1,7 @@
+two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen