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by Sumit Chourasia | Oct 02, 2020 | Category :coding | Tags : algorithm data-structure easy leetcode maths

Count Odd Numbers in an Interval Range - Math - Easy - LeetCode

Count Odd Numbers in an Interval Range - Math - Easy - LeetCode

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

public class Solution {
    public int CountOdds(int low, int high) {        
        
        if(low%2==0 && high%2==0){
            return (high-low)/2;
        }
        
        return ((high-low)/2)+1;
    }
}

Time Complexity: O(1)

Space Complexity: O(1)