diff --git a/std-script/run b/std-script/run
new file mode 100755
--- /dev/null
+++ b/std-script/run
@@ -0,0 +1,99 @@
+#!/usr/bin/ruby
+
+if ARGV.length < 2 || ARGV.length > 3
+  puts "Usage: run <language> <test-num> [<program-name>]"
+  exit(127)
+end
+
+language = ARGV[0]
+test_num = ARGV[1].to_i
+if ARGV.length > 2
+  program_name = ARGV[2]
+else
+  program_name = "a.out"
+end
+
+problem_home = ENV['PROBLEM_HOME']
+require "#{problem_home}/script/test_dsl.rb"
+load "#{problem_home}/test_cases/all_tests.cfg"
+problem = Problem.get_instance
+
+if problem.well_formed? == false
+  puts "The problem specification is not well formed."
+  exit(127)
+end
+
+# Check if the test number is okay.
+if test_num <= 0 || test_num > problem.num_tests
+  puts "You have specified a wrong test number."
+  exit(127)
+end
+
+#####################################
+# Set the relavant file names here. #
+#####################################
+
+input_file_name = "#{problem_home}/test_cases/#{test_num}/input-#{test_num}.txt"
+
+#####################################
+
+time_limit = problem.get_time_limit test_num
+mem_limit = problem.get_mem_limit(test_num) * 1024
+
+# Copy the input file.
+#`cp #{problem_home}/test_cases/#{test_num}/#{input_file_name} .`
+
+# Run the program.
+run_command = "/usr/bin/time -f \"%E\" 2>run_result #{problem_home}/script/box -a 2 -f -t #{time_limit} -m #{mem_limit} -i #{input_file_name} -o output.txt #{program_name}"
+puts "Running test #{test_num}..."
+puts run_command
+puts 
+system(run_command)
+
+# Create the result file. 
+result_file = File.new("result", "w") 
+comment_file = File.new("comment", "w")
+
+# Check if the program actually produced any output.
+run_result_file = File.new("run_result", "r")
+run_result = run_result_file.readlines
+run_result_file.close
+time_elapsed = run_result[run_result.length-1]
+
+report = lambda{ |status, points, comment|
+  result_file.write status.strip
+  result_file.write "\n" 
+  result_file.write points.to_s.strip
+  result_file.write "\n" 
+  result_file.write time_elapsed.strip 
+  result_file.write "\n"
+  result_file.close 
+  `rm run_result`
+  `rm output.txt`
+
+  comment_file.write comment
+  comment_file.close
+
+  puts 
+  puts "Done!"
+  exit(0)  
+}
+
+if run_result[0][0,2] != "OK"
+  puts "There was a runtime error."
+  report.call(run_result[0], 0, "No comment.\n")
+end
+
+# Run 'check' to evaluate the output.
+#puts "There was no runtime error. Proceed to checking the output."
+check_command = "#{problem_home}/script/check #{language} #{test_num}"
+puts "Checking the output..."
+puts check_command
+if not system(check_command)
+  exit(127)
+end
+
+check_file = File.new("check_result", "r")
+check_file_lines = check_file.readlines
+
+report.call(check_file_lines[0], check_file_lines[1], "No comment.\n")