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Time Limit
Memory Limit
Input File
Output File
2 seconds
512 MiB
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Problem info
Subtask 1 (25 points) has 29 cases.
Subtask 2 (15 points) has 55 cases.
Subtask 3 (30 points) has 44 cases.
Subtask 4 (30 points) has 87 cases.
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