0 subtask (0 points): 1
1 substak (11 points): 2-7
2 subtask (17 points): 8-14
3 subtask (13 points): 15-22
4 subtask (18 points): 23-31
5 subtask (12 points): 32-40
6 subtask (29 points): 41-51
The points for a subtask are given only if all the tests for the subtask are passed.
