Added the first days

1 files changed, 39 insertions, 0 deletions

diff --git a/2021/01/first.go b/2021/01/first.go
new file mode 100644
index 0000000..59b958c
--- /dev/null
+++ b/2021/01/first.go
@@ -0,0 +1,39 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+)
+
+func main() {
+	f, err := os.Open("input")
+	if err != nil {
+		log.Fatalf("%+v", err)
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	scanner.Split(bufio.ScanLines)
+
+	scanner.Scan()
+	prev, err := strconv.Atoi(scanner.Text())
+	if err != nil {
+		log.Fatalf("%+v", err)
+	}
+	result := 0
+
+	for scanner.Scan() {
+		i, err := strconv.Atoi(scanner.Text())
+		if err != nil {
+			log.Fatalf("%+v", err)
+		}
+		if i > prev {
+			result++
+		}
+		prev = i
+	}
+	fmt.Println(result)
+}