1523. Count Odd Numbers in an Interval Range

🟩 Easy

Given two non-negative integers low and high. Return the count of odd numbers between low and high (inclusive).

Example 1

Input: low = 3, high = 7 Output: 3 Explanation: The odd numbers between 3 and 7 are [3,5,7].

Example 2

Input: low = 8, high = 10 Output: 1 Explanation: The odd numbers between 8 and 10 are [9].

Constraints

• 0 <= low <= high <= 10^9

Hint-1

If the range (high - low + 1) is even, the number of even and odd numbers in this range will be the same.

Hint-2

If the range (high - low + 1) is odd, the solution will depend on the parity of high and low.

Solution

My Solution

func countOdds(low int, high int) int {
    return (high + 1)/2 - low / 2
}

result

Leetcode: link