initial commit

.devcontainer/devcontainer.json

@@ -0,0 +1,10 @@
+{
+	"name": "Go",
+	"image": "mcr.microsoft.com/devcontainers/go:0-1.21-bullseye",
+	"portsAttributes": {
+		"9000": {
+			"label": "Hello Remote World",
+			"onAutoForward": "notify"
+		}
+	}
+}

.github/workflows/ci.yaml

@@ -0,0 +1,25 @@
+name: Build and Test
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.21
+
+    - name: Build
+      run: go build -v ./...
+
+    - name: Test
+      run: go test -v ./...

.gitignore

@@ -0,0 +1,19 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+.idea
+
+.DS_Store

README.md

@@ -0,0 +1,21 @@
+# 🎄 Advent of Code 2023 🎄
+
+Working through problems for [Advent of Code 2023](https://adventofcode.com/2023).
+
+Using [Go](https://go.dev/)
+
+## Running
+
+Use VS Code and open this project in a [Dev Container](https://code.visualstudio.com/docs/devcontainers/containers) without needing to install any tooling locally.
+
+Inside the container, run the following command to test a given day's problem.
+
+```shell
+go test ./puzzles/day00
+```
+
+To run the given puzzle input for the day.
+
+```shell
+go run puzzles/day00/main.go
+```

go.mod

@@ -0,0 +1,3 @@
+module github.com/kylehoehns/aoc-2023-go
+
+go 1.21

puzzles/day00/input.txt

@@ -0,0 +1,200 @@
+1864
+1192
+1802
+1850
+1986
+1514
+1620
+1910
+1557
+1529
+1081
+1227
+1869
+1545
+1064
+1509
+1060
+1590
+1146
+1855
+667
+1441
+1241
+1473
+1321
+1429
+1534
+1959
+1188
+1597
+1256
+1673
+1879
+1821
+1423
+1838
+1392
+1941
+1124
+1629
+1780
+1271
+1190
+1680
+1379
+1601
+1670
+1916
+1787
+1844
+2000
+1672
+1276
+1896
+1746
+1369
+1687
+1263
+1948
+1159
+1710
+1304
+1806
+1709
+1286
+1635
+1075
+1125
+1607
+1408
+1903
+1143
+1736
+1266
+1645
+1571
+1488
+1200
+211
+1148
+1585
+2005
+1724
+1071
+1690
+1189
+1101
+1315
+1452
+1622
+1074
+1486
+1209
+1253
+1422
+1235
+1354
+1399
+1675
+241
+1229
+1136
+1901
+1453
+1344
+1685
+1985
+1455
+1764
+1634
+1935
+1386
+1772
+1174
+1743
+1818
+1156
+1221
+167
+1398
+1552
+1816
+1197
+1829
+1930
+1812
+1983
+1185
+1579
+1928
+1892
+1978
+1720
+1584
+1506
+1245
+1539
+1653
+1876
+1883
+1982
+1114
+1406
+2002
+1765
+1175
+1947
+1519
+1943
+1566
+1361
+1830
+1679
+999
+1366
+1575
+1556
+1555
+1065
+1606
+1508
+1548
+1162
+1664
+1525
+1925
+1975
+1384
+1076
+1790
+1656
+1578
+1671
+1424
+757
+1485
+1677
+1583
+1395
+1793
+1111
+1522
+1195
+1128
+1123
+1151
+1568
+1559
+1331
+1191
+1753
+1630
+1979
+953
+1480
+1655
+1100
+1419
+1560
+1667

puzzles/day00/main.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/kylehoehns/aoc-2023-go/utils/files"
+)
+
+// Example using 2020 Day 1 https://adventofcode.com/2020/day/1
+func main() {
+	lines := files.ReadLines("input.txt")
+	var expenses []int
+	for _, line := range lines {
+		i, err := strconv.Atoi(line)
+		if err != nil {
+			panic(err)
+		}
+		expenses = append(expenses, i)
+	}
+	fmt.Println("Part 1: ", part1(expenses))
+	fmt.Println("Part 2: ", part2(expenses))
+}
+
+func part1(expenses []int) int {
+	for i, first := range expenses {
+		for j, second := range expenses {
+			if i < j && first+second == 2020 {
+				return first * second
+			}
+		}
+	}
+	return -1
+}
+
+func part2(expenses []int) int {
+	for _, first := range expenses {
+		for _, second := range expenses {
+			for _, third := range expenses {
+				if first+second+third == 2020 {
+					return first * second * third
+				}
+			}
+		}
+	}
+	return -1
+}

puzzles/day00/main_test.go

@@ -0,0 +1,31 @@
+package main
+
+import "testing"
+
+func TestPart1(t *testing.T) {
+
+	t.Run("Part 1", func(t *testing.T) {
+
+		expenses := []int{1721, 979, 366, 299, 675, 1456}
+		actual := part1(expenses)
+		expected := 514579
+		if actual != expected {
+			t.Errorf("Expected %d but actual was %d", expected, actual)
+		}
+	})
+
+}
+
+func TestPart2(t *testing.T) {
+
+	t.Run("Part 2", func(t *testing.T) {
+
+		expenses := []int{1721, 979, 366, 299, 675, 1456}
+		actual := part2(expenses)
+		expected := 241861950
+		if actual != expected {
+			t.Errorf("Expected %d but actual was %d", expected, actual)
+		}
+	})
+
+}