add duration output

02/main.go

@@ -6,12 +6,17 @@ import (
 	"os"
 	"strconv"
 	"strings"
+	"time"
 	"unicode"
 )
 
 func main() {
+	start := time.Now()
 	partOne()
+	duration := time.Since(start)
 	partTwo()
+	duration2 := time.Since(start)
+	fmt.Printf("p1: %s, p2: %s\n", duration, duration2-duration)
 }
 
 //To try to debug the problem, they have created a list (your puzzle input) of passwords (according to the corrupted database) and the corporate policy when that password was set.