diff --git a/app/controllers/report_controller.rb b/app/controllers/report_controller.rb
--- a/app/controllers/report_controller.rb
+++ b/app/controllers/report_controller.rb
@@ -12,6 +12,45 @@
     admin_authorization
   }
 
+  def show_max_score
+  end
+
+  def get_max_score
+    #process list of problems
+
+    #process submission range
+    if params[:commit] == 'download csv'
+      @problems = Problem.all
+    else
+      @problems = Problem.find_available_problems
+    end
+    @users = User.find(:all, :include => [:contests, :contest_stat])
+    @scorearray = Array.new
+    #set up range from param
+    since_id = params.fetch(:since_id, 0).to_i
+    until_id = params.fetch(:until_id, 0).to_i
+    @users.each do |u|
+      ustat = Array.new
+      ustat[0] = u
+      @problems.each do |p|
+        max_points = 0
+        Submission.find_in_range_by_user_and_problem(u.id,p.id,since_id,until_id).each do |sub|
+          max_points = sub.points if sub and sub.points and (sub.points > max_points)
+        end
+        ustat << [(max_points.to_f*100/p.full_score).round, (max_points>=p.full_score)]
+      end
+      @scorearray << ustat
+    end
+
+    if params[:commit] == 'download csv' then
+      csv = gen_csv_from_scorearray(@scorearray,@problems)
+      send_data csv, filename: 'max_score.csv'
+    else
+      render template: 'user_admin/user_stat'
+    end
+
+  end
+
   def score
     if params[:commit] == 'download csv'
       @problems = Problem.all