Bitwise OR Sequences
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0 (0 votes)
Dynamic programming
Algorithms
Approved
Hard
Problem
82% Success 131 Attempts 50 Points 2s Time Limit 256MB Memory 1024 KB Max Code

For some number X, let \(F(X)\) denote the total number of sequences having length ≤ K such that bitwise OR of all the elements in a sequence is equal to X.

For a given N , K and prime p, calculate the value of \( \sum_{i=0}^{N} \) \(p^{i}\) * \(F(i)\).

Input:
Input will consists of several test cases.
First line of input will consists of a single integer T denoting the number of test cases. Each of the next T lines consist of integers N , K and p separated by a single space.

Output:
For each test case, output \( \sum_{i=0}^{N} \) \(p^{i}\) * \(F(i)\). Since, the value can be large, output the value modulo \(10^{9} + 7\).

Constraints:

  • \(1 ≤ T ≤ 10^{4}\)
  • \(0 ≤ N < 2^{32}\)
  • \(1 ≤ K ≤ 10^{6}\)
  • \(2 ≤ p < 10^{6}\) where p is a prime number.

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