Big update: Adding all advent of codes to same repo

AdventOfCode2021/day1/day1.go

@@ -0,0 +1,41 @@
+package day1
+
+import (
+	"bytes"
+	"strconv"
+)
+
+func Run(dat []byte) (int, int) {
+
+  lines := bytes.Split(dat, []byte("\n"))
+
+  increase := 0
+  increaseWindow := 0
+
+  for i := 0; i < len(lines) - 1; i++ {
+    
+    num1, _ := strconv.Atoi(string(lines[i]))
+    num2, _ := strconv.Atoi(string(lines[i + 1]))
+
+    if num1 < num2 {
+      increase++
+    }
+
+  }
+
+  for i := 0; i < len(lines) - 3; i++ {
+    
+    num1, _ := strconv.Atoi(string(lines[i]))
+    num2, _ := strconv.Atoi(string(lines[i + 1]))
+    num3, _ := strconv.Atoi(string(lines[i + 2]))
+    num4, _ := strconv.Atoi(string(lines[i + 3]))
+
+    if num1 + num2 + num3 < num2 + num3 + num4 {
+      increaseWindow++
+    }
+
+  }
+
+  return increase, increaseWindow
+
+}