CodeForces#12 D.Ball

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HDU 1024 Max Sum Plus Plus

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CodeForces#242 E.XOR on Segment

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Atcoder Grand Contest#016 F.Games on DAG

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CodeForces#254 C.DZY Loves Colors

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CodeForces#271 F.Ant Colony

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HDU 1848 Fibonacci again and again

02-13

ZOJ 2640 Help Me Escape

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POJ2096 Collecting Bugs

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CodeForces#301 D.Bad Luck Island

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