Sources

  2. International Olympiad in Informatics
  3. 2009
  4. Day 1
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1IOI09_archery
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Archery Batch 12
2IOI09_hiring
0 / 100
Hiring Batch 99
3IOI09_poi
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Poi Batch 244
4IOI09_raisins
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Raisins Batch 184