black_hole6的博客

The least common multiple (LCM) of a set of positive integers is the smallest positive integer which is divisible by all the numbers in the set. For example, the LCM of 5, 7 and 15 is 105.    Input ...

度熊面前有一个全是由1构成的字符串，被称为全1序列。你可以合并任意相邻的两个1，从而形成一个新的序列。对于给定的一个全1序列，请计算根据以上方法，可以构成多少种不同的序列。 Input 这里包括多组测试数据，每组测试数据包含一个正整数NN，代表全1序列的长度。  1≤N≤2001≤N≤200 Output 对于每组测试数据，输出一个整数，代表由题目中所给定的全1序列所能形成的新序列的数量。...

There are another kind of Fibonacci numbers: F(0) = 7, F(1) = 11, F(n) = F(n-1) + F(n-2) (n>=2).  Input Input consists of a sequence of lines, each containing an integer n. (n < 1,000,000).  ...

In many applications very large integers numbers are required. Some of these applications are using keys for secure transmission of data, encryption, etc. In this problem you are given a number, you h...

The digital root of a positive integer is found by summing the digits of the integer. If the resulting value is a single digit then that digit is the digital root. If the resulting value contains two ...

A histogram is a polygon composed of a sequence of rectangles aligned at a common base line. The rectangles have equal widths but may have different heights. For example, the figure on the left shows ...

小明对数的研究比较热爱，一谈到数，脑子里就涌现出好多数的问题，今天，小明想考考你对素数的认识。  　　问题是这样的：一个十进制数，如果是素数，而且它的各位数字和也是素数，则称之为“美素数”，如29，本身是素数，而且2+9 = 11也是素数，所以它是美素数。  　　给定一个区间，你能计算出这个区间内有多少个美素数吗？ Input 第一行输入一个正整数T，表示总共有T组数据(T <= 100...

作为杭电的老师，最盼望的日子就是每月的8号了，因为这一天是发工资的日子，养家糊口就靠它了，呵呵  但是对于学校财务处的工作人员来说，这一天则是很忙碌的一天，财务处的小胡老师最近就在考虑一个问题：如果每个老师的工资额都知道，最少需要准备多少张人民币，才能在给每位老师发工资的时候都不用老师找零呢？  这里假设老师的工资都是正整数，单位元，人民币一共有100元、50元、10元、5元、2元和1元六种。  ...

The three hands of the clock are rotating every second and meeting each other many times everyday. Finally, they get bored of this and each of them would like to stay away from the other two. A hand i...

更新在了博客园https://www.cnblogs.com/Staceyacm/p/11280622.html