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题目描述Volodya is an odd boy and his taste is strange as well. It seems to him that a positive integer number is beautiful if and only if it is ... 阅读全文
2016年2月17日
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题目描述Balanced numbers have been used by mathematicians for centuries. A positive integer is considered a balanced number if:1) Every even... 阅读全文
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题目描述The reflected binary code, also known as Gray code after Frank Gray, is a binary numeral system where two successive values differ in onl... 阅读全文
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题目描述对于一个正整数 n，定义 f(n) 为它十进制下每一位数字的平 方的和。 现在给定三个正整数 k,a,b，请求出满足 a≤n≤b 且 k×f(n) = n 的 n 的个数。 1≤k,a,b≤10^18 a≤b样例输入51 5000 10000样例输出3题目分析可以发现当每... 阅读全文
