2021: Day 1

2021/day1/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+)
+
+func part1(depths []int) int {
+	inc := 0
+	for i := 0; i < len(depths)-1; i++ {
+		if depths[i+1] > depths[i] {
+			inc++
+		}
+	}
+	return inc
+}
+
+func part2(depths []int) int {
+	inc := 0
+	for i := 0; i < len(depths)-3; i++ {
+		if depths[i+3] > depths[i] {
+			inc++
+		}
+	}
+	return inc
+}
+
+func main() {
+	f, err := os.Open("./input/day1.txt")
+	if err != nil {
+		panic(err)
+	}
+
+	scanner := bufio.NewScanner(f)
+	scanner.Split(bufio.ScanLines)
+	var depths []int
+	for scanner.Scan() {
+		i, err := strconv.Atoi(scanner.Text())
+		if err != nil {
+			panic(err)
+		}
+		depths = append(depths, i)
+	}
+
+	fmt.Println(part1(depths))
+	fmt.Println(part2(depths))
+}