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In July 2004, Google posted on a giant billboard along Highway 101 in Silicon Valley (shown in the picture below) for recruitment. The content is supe 阅读全文
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A proper vertex coloring is a labeling of the graph's vertices with colors such that no two vertices sharing the same edge have the same color. A colo 阅读全文
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When the input is much too large to fit into memory, we have to do external sorting instead of internal sorting. One of the key steps in external sort 阅读全文