Factorial to Square
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Given a positive integer n, we want to remove some values between 1 and n such that the product of the remaining ones is a perfect square number (i.e. the product = x * x, for some integer x). Meanwhile, we also want to maximize the product. Therefore, we are interested in the number of ways to remove some values to achieve the maximum perfect square product. The answer may be very large, and therefore, you just need to output its remainder by dividing m.
We define the product of an empty set as 1.
The first line contains an integer T denoting the total number of test cases.
In each test case, there are two positive integers n and m in a line separated by a single space.
For each test case, output the answer per line.
- 1 <= T <= 10
- 1 <= n <= 3,000
- 1 <= m <= 109 + 7
Input: 2 2 10 5 10 Output: 2 2
In the first case, you can either remove 2 or remove both 1 and 2. In the second case, you can either remove 2, 3, 5 or remove 1, 2, 3, 5.
|Tags||cook63, medium-hard, shangjingbo|
|Time Limit:||1 sec|
|Source Limit:||50000 Bytes|
|Languages:||C, CPP14, JAVA, PYTH, PYTH 3.6, PYPY, CS2, PAS fpc, PAS gpc, RUBY, PHP, GO, NODEJS, HASK, SCALA, D, PERL, FORT, WSPC, ADA, CAML, ICK, BF, ASM, CLPS, PRLG, ICON, SCM qobi, PIKE, ST, NICE, LUA, BASH, NEM, LISP sbcl, LISP clisp, SCM guile, JS, ERL, TCL, PERL6, TEXT, SCM chicken, PYP3, CLOJ, FS|
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