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Hack!
QOJ will undergo maintenance on July 5th from 02:00 to 04:00 (UTC +8). The service may be unavailable during this time.
Time Limit: 0.4 s
Memory Limit: 1024 MB
Latin America 2019
G. Gluing Pictures
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Custom Test
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Time Limit:
0.3s → 0.4s
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