Today I have done leetcode's February LeetCoding Challenge with cpp.

February LeetCoding Challenge 13

Description

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

Solution

class Solution {
public:
  int countOdds(int low, int high) {
    return (high - low) / 2 + ((low | high) & 1);
  }
};

// Accepted
// 84/84 cases passed (0 ms)
// Your runtime beats 100 % of cpp submissions
// Your memory usage beats 7.66 % of cpp submissions (6 MB)