diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -154,7 +154,6 @@
       user_ip = IPAddr.new(request.remote_ip)
 
       GraderConfiguration[WHITELIST_IP_CONF_KEY].delete(' ').split(',').each do |ips|
-        puts "ip is #{ips}, user ip is #{user_ip}"
         allow_ips = IPAddr.new(ips)
         if allow_ips.include?(user_ip)
           return true
diff --git a/app/controllers/submissions_controller.rb b/app/controllers/submissions_controller.rb
--- a/app/controllers/submissions_controller.rb
+++ b/app/controllers/submissions_controller.rb
@@ -75,9 +75,6 @@
   def get_latest_submission_status
     @problem = Problem.find(params[:pid])
     @submission = Submission.find_last_by_user_and_problem(params[:uid],params[:pid])
-    puts User.find(params[:uid]).login
-    puts Problem.find(params[:pid]).name
-    puts 'nil' unless @submission
     respond_to do |format|
       format.js
     end
diff --git a/app/views/report/_score_table.html.haml b/app/views/report/_score_table.html.haml
--- a/app/views/report/_score_table.html.haml
+++ b/app/views/report/_score_table.html.haml
@@ -15,8 +15,6 @@
     - sum = Array.new(@problems.count+1,0)
     - nonzero = Array.new(@problems.count+1,0)
     - full = Array.new(@problems.count+1,0)
-    - puts @scorearray
-    - puts @problems.count
     - @scorearray.each do |sc|
       %tr
         - total,num_passed = 0,0