SPOJ:Easy Factorials(占位)
Finding factorials are easy but they become large quickly that is why Lucky hate factorials. Today he have another task related to factorials.
For a given number n how many ways factorial n can expressed as a sum of two or more consecutive positive integers. Can you help lucky ?
Input
First line contains single integer T < 5001, next T lines followed by an integer N<10^8 and M<10^9.
where M is a prime number.
Output
Print the desired result mod M.
Example
Input: 1 3 7 Output: 1
Explanation:: 3! = 1+2+3 only one way.
Speed Adicts My best time for all cases is 1.57s. Best of Luck have fun:) .
题意:给定N,问N的阶乘可以表示为一段连续数字之和的方案数,答案模M。
思路:无。
It is your time to fight!