Added AOC 2021 day 01

www/statics/aoc/2021/01_solution.go

@@ -0,0 +1,61 @@
+package advent
+
+import (
+	"AdventOfCode2021/util"
+	"math"
+	"strconv"
+)
+
+func Day1Part1(ctx *util.AOCContext) (string, error) {
+
+	incCount := 0
+
+	val := int64(math.MaxInt64)
+	for _, v := range ctx.InputLines() {
+		num, err := strconv.ParseInt(v, 10, 64)
+		if err != nil {
+			return "", err
+		}
+
+		if val < num {
+			incCount++
+		}
+		val = num
+	}
+
+	return strconv.Itoa(incCount), nil
+}
+
+func Day1Part2(ctx *util.AOCContext) (string, error) {
+
+	incCount := 0
+
+	input := ctx.InputLines()
+
+	prev := int64(math.MaxInt64)
+
+	sw0 := int64(0)
+	sw1 := int64(0)
+	sw2 := int64(0)
+
+	for i, v := range input {
+		num, err := strconv.ParseInt(v, 10, 64)
+		if err != nil {
+			return "", err
+		}
+
+		sw0 = sw1
+		sw1 = sw2
+		sw2 = num
+
+		val := sw0 + sw1 + sw2
+
+		if i > 2 && prev < val {
+			incCount++
+			//fmt.Printf("%d < %d + %d + %d\n", prev, sw0, sw1, sw2)
+		}
+		prev = val
+	}
+
+	return strconv.Itoa(incCount), nil
+}