2020 day 1 Complete

2020/day01/main.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+func main() {
+	inp := h.StdinToIntSlice()
+	fmt.Println("# Part 1")
+	part1(inp)
+	fmt.Println("# Part 2")
+	part2(inp)
+}
+
+func part1(input []int) {
+	for i := 0; i < len(input); i++ {
+		for j := i + 1; j < len(input); j++ {
+			if input[i]+input[j] == 2020 {
+				fmt.Printf("Entries %d and %d sum to 2020\n", i, j)
+				fmt.Printf("Answer: %d\n", input[i]*input[j])
+				return
+			}
+		}
+	}
+}
+
+func part2(input []int) {
+	for i := 0; i < len(input); i++ {
+		for j := i + 1; j < len(input); j++ {
+			for k := j + 1; k < len(input); k++ {
+				if input[i]+input[j]+input[k] == 2020 {
+					fmt.Printf("Entries %d, %d, and %d sum to 2020\n", i, j, k)
+					fmt.Printf("Answer: %d\n", input[i]*input[j]*input[k])
+					return
+				}
+			}
+		}
+	}
+}