diff --git a/grader b/grader
--- a/grader
+++ b/grader
@@ -69,6 +69,30 @@
   submission.save
 end
 
+def copy_script(problem_home)
+  script_dir = "#{problem_home}/script"
+  std_script_dir = File.dirname(__FILE__) + '/std-scripts'
+  scripts = Dir[std_script_dir + '/*']
+  
+  copied = []
+
+  scripts.each do |s|
+    fname = File.basename(s)
+    if !FileTest.exist?("#{script_dir}/#{fname}")
+      copied << fname
+      system("cp #{s} #{script_dir}")
+    end
+  end
+
+  return copied
+end
+
+def clear_script(problem_home,log)
+  log.each do |s|
+    system("rm #{problem_home}/script/#{s}")
+  end
+end
+
 def grade(submission_id)
   current_dir = `pwd`.chomp
 
@@ -94,9 +118,14 @@
   source_name = "#{problem.name}.#{lang_ext}"
 
   save_source(sub,problem_out_dir,source_name)
+
+  copy_log = copy_script(problem_home)
+
   call_judge(problem_home,language,problem_out_dir,source_name)
   save_result(sub,read_result("#{problem_out_dir}/test-result"))
 
+  clear_script(copy_log,problem_home)
+
   Dir.chdir(current_dir)
 end
 
@@ -112,6 +141,10 @@
   system("rm " + File.dirname(__FILE__) + '/stop')
 end
 
+#########################################
+# main program
+#########################################
+
 # reading environment and options
 if (ARGV.length >= 1) and (ARGV[0]=='stop')
   stop_grader
diff --git a/import_problem b/import_problem
--- a/import_problem
+++ b/import_problem
@@ -57,7 +57,7 @@
 system("mkdir #{problem}")
 system("mkdir #{problem}/script")
 system("mkdir #{problem}/test_cases")
-system("cp #{GRADER_DIR}/std-script/* #{problem}/script")
+#system("cp #{GRADER_DIR}/std-script/* #{problem}/script")
 
 puts "copying testcases"