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People on Mars count their numbers with base 13: Zero on Earth is called "tret" on Mars. The numbers 1 to 12 on Earth is called "jan, feb, mar, apr, m 阅读全文
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There is a classical process named partition in the famous quick sort algorithm. In this process we typically choose one element as the pivot. Then th 阅读全文
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The following is from Max Howell @twitter: Google: 90% of our engineers use the software you wrote (Homebrew), but you can't invert a binary tree on a 阅读全文
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The K−P factorization of a positive integer N is to write N as the sum of the P-th power of K positive integers. You are supposed to write a program t 阅读全文