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A car travels from a starting position to a destination which is target miles east of the starting position. Along the way, there are gas stations. Ea 阅读全文
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There are a row of n houses, each house can be painted with one of the k colors. The cost of painting each house with a certain color is different. Yo 阅读全文
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因为最近的工作要和Horovod打交道，所以分析了Horovod的源码。在这里记一笔。 Horovod有几个亮点，第一，它不依托于某个框架，自己通过MPI建立了一套分布式系统，完成了allreduce, allgather等collective operations通信工作. 第二，发现了Tenso 阅读全文
摘要：
Given an Android 3x3 key lock screen and two integers m and n, where 1 ≤ m ≤ n ≤ 9, count the total number of unlock patterns of the Android lock scre 阅读全文