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  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
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  5. 5 Paid Test Task and Follow-Up Interview
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Problems > Squares in a Range

Squares in a Range

Difficulty: 1200 2000 ms 128 MB

math

How many perfect squares lie in [L, R]?

Input: one line with two integers L and R.

Output: ⌊√R⌋ − ⌊√(L−1)⌋.

Constraints:

  • 1 ≤ L ≤ R ≤ 1018

Sample Tests

Input 1
4 16
Output 1
3
Input 2
5 8
Output 2
0

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