摘要:
Going from u to v or from v to u?Time Limit: 2000MSMemory Limit: 65536KTotal Submissions: 11440Accepted: 2929DescriptionIn order to make their sons brave, Jiajia and Wind take them to a big cave. The cave has n rooms, and one-way corridors connecting some rooms. Each time, Wind choose two rooms x an 阅读全文
posted @ 2012-10-04 00:33
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