Grady_Ne的博客

Sum(HDU 4407) XXX is puzzled with the question below: 1, 2, 3, ..., n (1<=n<=400000) are placed in a line. There are m (1<=m<=1000) operations of two kinds. Operation 1: among the x-th numbe

Now you get a number N, and a M-integers set, you should find out how many integers which are small than N, that they can divided exactly by any integers in the set. For example, N=12, and M-integer s

GCD Given 5 integers: a, b, c, d, k, you're to find x in a...b, y in c...d that GCD(x, y) = k. GCD(x, y) means the greatest common divisor of x and y. Since the number of choices may be very large, y

Co-prime       Given a number N, you are asked to count the number of integers between A and B inclusive which are relatively prime to N. Two integers are said to be co-prime or relatively pri

Visible Trees There are many trees forming a m * n grid, the grid starts from (1,1). Farmer Sherlock is standing at (0,0) point. He wonders how many trees he can see. If two trees and Sherlock

Ignatius 喜欢收集蝴蝶标本和邮票，但是Eddy的爱好很特别，他对数字比较感兴趣，他曾经一度沉迷于素数，而现在他对于一些新的特殊数比较有兴趣。 这些特殊数是这样的：这些数都能表示成M^K，M和K是正整数且K>1。 正当他再度沉迷的时候，他发现不知道什么时候才能知道这样的数字的数量，因此他又求助于你这位聪明的程序员，请你帮他用程序解决这个问题。 为了简化，问题是这样的：给你一个正整数N，确定在1到N之间有多少个可以表示成M^K（K>1)的数。