diff --git a/import_problem b/import_problem
--- a/import_problem
+++ b/import_problem
@@ -32,8 +32,8 @@
 end
 
 def copy_testcase(importing_test_dir,fname,dir,i)
-  system("cp #{importing_test_dir}/#{fname}.in #{input_filename(dir,i)}")
-  system("cp #{importing_test_dir}/#{fname}.sol #{answer_filename(dir,i)}")
+  FileUtils.cp("#{importing_test_dir}/#{fname}.in", "#{input_filename(dir,i)}")
+  FileUtils.cp("#{importing_test_dir}/#{fname}.sol", "#{answer_filename(dir,i)}")
 end
 
 def process_options(options)
@@ -100,6 +100,12 @@
   end while true
 end
 
+def create_dir_if_not_exists(dir)
+  if ! FileTest.exists? dir
+    FileUtils.mkdir(dir)
+  end
+end
+
 def import_problem(ev_dir, problem, testcase_dir, num_testruns, raw_prefix, check_script, options)
   testrun_info = build_testrun_info_from_dir(num_testruns, testcase_dir, raw_prefix)
 
@@ -113,9 +119,9 @@
   # start working
   puts "creating directories"
 
-  system("mkdir #{problem_dir}")
-  system("mkdir #{problem_dir}/script")
-  system("mkdir #{problem_dir}/test_cases")
+  create_dir_if_not_exists("#{problem_dir}")
+  create_dir_if_not_exists("#{problem_dir}/script")
+  create_dir_if_not_exists("#{problem_dir}/test_cases")
 
   puts "copying testcases"
 
@@ -132,7 +138,7 @@
       
       puts "copy #{testcase_fname} to #{testcase_num}"
       
-      system("mkdir #{problem_dir}/test_cases/#{testcase_num}")
+      create_dir_if_not_exists("#{problem_dir}/test_cases/#{testcase_num}")
       copy_testcase("#{testcase_dir}",testcase_fname,"#{problem_dir}/test_cases/#{testcase_num}",testcase_num)
       
       num_testcases += 1
@@ -163,14 +169,14 @@
     
     File.chmod(0755,"#{problem_dir}/script/check")
     
-    system("cp #{check_script_fname} #{problem_dir}/script/#{script_name}")
+    FileUtils.cp("#{check_script_fname}", "#{problem_dir}/script/#{script_name}")
   else
     if File.exists?(SCRIPT_DIR + "/templates/check.#{check_script}")
       check_script_fname = SCRIPT_DIR + "/templates/check.#{check_script}"
     else
       check_script_fname = check_script
     end
-    system("cp #{check_script_fname} #{problem_dir}/script/check")
+    FileUtils.cp("#{check_script_fname}", "#{problem_dir}/script/check")
   end
   
   # generating test_request directory
@@ -185,8 +191,10 @@
   cfg_file.puts test_request_all_test_cfg.result
   cfg_file.close
   
-  system("cp #{SCRIPT_DIR}/templates/check_empty #{ev_dir}/test_request/#{problem}/script/check")
-  system("cp #{SCRIPT_DIR}/templates/answer-1.txt #{ev_dir}/test_request/#{problem}/test_cases/1")
+  FileUtils.cp("#{SCRIPT_DIR}/templates/check_empty",
+               "#{ev_dir}/test_request/#{problem}/script/check")
+  FileUtils.cp("#{SCRIPT_DIR}/templates/answer-1.txt",
+               "#{ev_dir}/test_request/#{problem}/test_cases/1")
   
   puts "done"
 end