ID	grade(50%)
414	49.63
222	48.93
311	47.9
877	47.63
251	47.5
548	47.4
603	47.17
190	46.97
5467	45.73
274	45.5
112	45.37
223	45.2
778	45.1
096	44.67
540	44.4
638	42.7
285	42.57
926	41.93
235	41.3
8467	40.53
628	40.47
598	40.43
652	39.03
893	38.53
169	38.53
845	38.43
146	38
772	37.97
264	37.83
465	37.4
559	35.5
088	32.7
854	32.6
738	8.43
338	0.83