1523.go

// Source: https://leetcode.com/problems/count-odd-numbers-in-an-interval-range
// Title: Count Odd Numbers in an Interval Range
// Difficulty: Easy
// Author: Mu Yang <http://muyang.pro>

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// 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
//
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

package main

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