means (#3)

Co-authored-by: Evan Burkey <dev@fputs.com>
Reviewed-on: https://git.fputs.com/fputs/protohackers/pulls/3

cmd/primetime/main.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"bufio"
 	"encoding/json"
 	"log"
 	"math/big"
@@ -29,13 +28,7 @@ func main() {
 }
 
 func primetime(c net.Conn) {
-	defer c.Close()
-	sc := bufio.NewScanner(c)
-	for sc.Scan() {
-		response := process(sc.Bytes())
-		c.Write(response)
-	}
-	if err := sc.Err(); err != nil {
+	if err := conn.ReadAndRespond(c, process); err != nil {
 		log.Fatalln(err)
 	}
 }