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USACO
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2017
11-01
[USACO08JAN]Haybale Guessing(LuoguP2898)
10-20
三值的排序 Sorting a Three-Valued Sequence(洛谷 P1459USACO2.1,IOI96Day2)
10-19
等差数列Arithmetic Progressions题解(USACO1.4)