look upon my bullshit, ye mighty, and dispair!

day9/main.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	d, _ := ioutil.ReadFile("input")
+	strings := strings.Split(string(d), "\n")
+	bad := 0
+	var ints []int
+	done := false
+	for _, s := range strings {
+		i, err := strconv.Atoi(s)
+		if err == nil {
+			ints = append(ints, i)
+		}
+	}
+	for i, _ := range ints {
+		if !((i + 26) > len(ints)) {
+			slice := ints[i : i+25]
+			sums := make(map[int]struct{})
+			for _, n := range slice {
+				for _, n2 := range slice {
+					if n != n2 {
+						sums[n+n2] = struct{}{}
+					}
+				}
+			}
+			bad = ints[i+25]
+			has := false
+			for i, _ := range sums {
+				if bad == i {
+					has = true
+				}
+			}
+			if has == false {
+				fmt.Println("Part 1: ", bad)
+				break
+				done = true
+			}
+			if done == true {
+				break
+			}
+		}
+		if done == true {
+			break
+		}
+	}
+	// Part 2: let's just brute force this
+	l := 2
+	for {
+		for x := 0; x < len(ints); x += 1 {
+			sl := ints[x : x+l]
+			total := 0
+			for _, digit := range sl {
+				total += digit
+			}
+			if total == bad {
+				fmt.Printf("Part 2: %d\n", sl[0]+sl[len(sl)-1:][0])
+				return
+			}
+		}
+		l++
+	}
+}