Big update: Adding all advent of codes to same repo

AdventOfCode2015/day4/day4.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"crypto/md5"
+	"fmt"
+	"io/ioutil"
+	"strconv"
+	"time"
+)
+
+type Coords struct {
+	x int
+	y int
+}
+
+func main() {
+
+	fmt.Println("Day 3")
+	start := time.Now()
+
+	dat, err := ioutil.ReadFile("day4.txt")
+	if err != nil {
+		panic(err)
+	}
+	input := string(dat)
+
+	part1 := ""
+	var hash [16]byte
+	for i := 1; part1 == ""; i++ {
+		hashString := input + strconv.Itoa(i)
+		hash = md5.Sum([]byte(hashString))
+		if hash[0] == 0x00 && hash[1] == 0x00 && hash[2] <= 0x0f {
+			part1 = hashString
+		}
+	}
+
+	elapsed := time.Since(start)
+	fmt.Printf("Part 1: %v %v \n", part1, elapsed)
+	start = time.Now()
+
+	part2 := ""
+	for i := 1; part2 == ""; i++ {
+		hashString := input + strconv.Itoa(i)
+		hash = md5.Sum([]byte(hashString))
+		if hash[0] == 0x00 && hash[1] == 0x00 && hash[2] == 0x00 {
+			part2 = hashString
+		}
+	}
+
+	elapsed = time.Since(start)
+	fmt.Printf("Part 2: %v %v", part2, elapsed)
+
+}