README.md

1523. Count Odd Numbers in an Interval Range

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

Solutions (Ruby)

1. Mathematical

# @param {Integer} low
# @param {Integer} high
# @return {Integer}
def count_odds(low, high)
    return (high - low + low % 2 + high % 2) / 2
end