should be Seocnd, not Last

handlers.go

@@ -11,7 +11,7 @@ import (
 type prob struct {
 	Operation string
 	First     int
-	Last      int
+	Second      int
 }
 
 type JsonHandler func(http.ResponseWriter, *http.Request)

main.go

@@ -21,8 +21,8 @@ func main() {
 	flag.Parse()
 	http.Handle("/",
 		http.FileServer(http.Dir(*static_files)))
-    http.HandleFunc("/api/v0/attempt/", JsonHandler(attempt))
     http.Handle("/api/v0/problem/", JsonHandler(problem))
+    http.Handle("/api/v0/attempt/", JsonHandler(attempt))
 	if err := http.ListenAndServe(*addr, nil); err != nil {
 		log.Fatal("ListenAndServe:", err)
 	}