Merge pull request #228 from simonlindholm/allow-negative-score

Allow negative scores as grader output

Author: pehrsoderman

problemtools/verifyproblem.py

@@ -1297,7 +1297,7 @@ def grade(self, sub_results, testcasegroup, shadow_result=False):
             graders = self._graders
 
         grader_input = ''.join(['%s %s\n' % (r.verdict, 0 if r.score is None else r.score) for r in sub_results])
-        grader_output_re = r'^((AC)|(WA)|(TLE)|(RTE)|(JE))\s+[0-9.]+\s*$'
+        grader_output_re = r'^((AC)|(WA)|(TLE)|(RTE)|(JE))\s+-?[0-9.]+\s*$'
         verdict = 'AC'
         score = 0