Day 4 part 1 done

2017/day4/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/bogosj/advent-of-code/fileinput"
+)
+
+func input() (ret [][]string) {
+	for _, line := range fileinput.ReadLines("input.txt") {
+		ret = append(ret, strings.Fields(line))
+	}
+	return
+}
+
+func passIsValid(in []string) bool {
+	m := map[string]bool{}
+	for _, word := range in {
+		if m[word] {
+			return false
+		}
+		m[word] = true
+	}
+	return true
+}
+
+func part1() {
+	var valid int
+	for _, pass := range input() {
+		if passIsValid(pass) {
+			valid++
+		}
+	}
+	fmt.Printf("There are %d valid pass phrases\n", valid)
+}
+
+func part2() {
+}
+
+func main() {
+	start := time.Now()
+	part1()
+	fmt.Println("Part 1 done in:", time.Since(start))
+	start = time.Now()
+	part2()
+	fmt.Println("Part 2 done in:", time.Since(start))
+}