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Time Limit
Memory Limit
2 seconds
256 MiB
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Problem info
Subtask 1 (10 points) has 6 cases.
Subtask 2 (15 points) has 13 cases.
Subtask 3 (20 points) has 9 cases.
Subtask 4 (20 points) has 10 cases.
Subtask 5 (35 points) has 45 cases.