Hiring process8 levels
  1. 1 IQ Test
  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
  4. 4 Unpaid Test Task (Motivation Check)
  5. 5 Paid Test Task and Follow-Up Interview
  6. 6 Iterative Paid Test Tasks
  7. 7 Office Verification
  8. 8 Final Interview with the Founder

Problems > Double or Add One

Double or Add One

Difficulty: 1500 2000 ms 128 MB

math greedy

Starting from A, each operation either doubles the value or adds 1. Print the minimum operations to reach exactly B (B ≥ A).

Input: one line with two integers A and B.

Output: the minimum number of operations.

Constraints:

  • 1 ≤ A ≤ B ≤ 1018

Sample Tests

Input 1
3 10
Output 1
3
Input 2
5 5
Output 2
0

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