h1 = t('.title')

- exercises = Exercise.where(:id => @user.submissions.group(:exercise_id).select(:exercise_id).distinct())

.table-responsive
  table.table.table-striped.sortable
    thead
      tr
        - ['.exercise', '.score', '.runs', '.worktime'].each do |title|
          th.header = t(title)
    tbody
      - exercises.each do |exercise|
        - if statistics[exercise.id] then stats = statistics[exercise.id] else stats = {"working_time" => 0, "runs" => 0, "score" => 0}
        tr
          td = link_to exercise, controller: "exercises", action: "statistics", external_user_id: @user.id, id: exercise.id
          td = stats["maximum_score"] or 0
          td = stats["runs"] or 0
          td = stats["working_time"] or 0