2022 Day 02 Complete!

2022/day02/main.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"fmt"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+func main() {
+	inp := h.StdinToStringSlice()
+	fmt.Println("# Part 1")
+	fmt.Printf("Score: %d\n", part1(inp))
+	fmt.Println("# Part 2")
+	fmt.Printf("Score: %d\n", part2(inp))
+}
+
+func part1(input []string) int {
+	score := 0
+	for i := range input {
+		first, second := input[i][0], (input[i][2] - 23)
+		score += int(second - 'A' + 1)
+		switch second - first {
+		case 1, 254:
+			score += 6
+		case 0:
+			score += 3
+		}
+	}
+	return score
+}
+
+func part2(input []string) int {
+	score := 0
+	for i := range input {
+		against, to := input[i][0], input[i][2]
+		choose := byte(64)
+		switch to {
+		case 'X':
+			choose = (against - 1)
+			if choose < 'A' {
+				choose = 'C'
+			}
+		case 'Y':
+			score += 3
+			choose = against
+		case 'Z':
+			choose = (against + 1)
+			if choose > 'C' {
+				choose = 'A'
+			}
+			score += 6
+		}
+		score += int(choose - 64)
+	}
+	return score
+}