摘要：
A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a re 阅读全文
摘要：
给定一个 k 位整数 1 (0, ,, dk−1>0)，请编写程序统计每种不同的个位数字出现的次数。例如：给定 0，则有 2 个 0，3 个 1，和 1 个 3。 输入格式： 每个输入包含 1 个测试用例，即一个不超过 1000 位的正整数 N。 输出格式： 对 N 中每一种不同的个位数字，以 阅读全文
摘要：
People in Mars represent the colors in their computers in a similar way as the Earth people. That is, a color is represented by a 6-digit number, wher 阅读全文
摘要：
Behind the scenes in the computer's memory, color is always talked about as a series of 24 bits of information for each pixel. In an image, the color 阅读全文