Day 5

day5/day5.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"crypto/md5"
+	"fmt"
+	"strconv"
+)
+
+func main() {
+
+	input := "ojvtpuvg"
+	output := ""
+
+	for i := 0; len(output) < 8; i++ {
+		hashStr := fmt.Sprintf("%x", md5.Sum([]byte(input+strconv.Itoa(i))))
+		if hashStr[:5] == "00000" {
+			fmt.Println(hashStr)
+			output += string(hashStr[5])
+		}
+	}
+
+	fmt.Println(output)
+}

day5b/day5b.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"crypto/md5"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func main() {
+
+	input := "ojvtpuvg"
+	output := make([]string, 8)
+	found := 0
+	for i := 0; found < 8; i++ {
+		hashStr := fmt.Sprintf("%x", md5.Sum([]byte(input+strconv.Itoa(i))))
+		if hashStr[:5] == "00000" {
+
+			pos := string(hashStr[5])
+			posInt, err := strconv.Atoi(pos)
+
+			// Only allow valids
+			if posInt < 8 && err == nil {
+				// Skip if value is already
+				if output[posInt] == "" {
+					output[posInt] = string(hashStr[6])
+					fmt.Println(output)
+					found++
+				}
+			}
+		}
+	}
+
+	fmt.Println(strings.Join(output, ""))
+}