count-odd-numbers-in-an-interval-range.cpp

//question//


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) {
        int count = 0;
        for(int i=low;i<=high;i++)
        {
            if(i%2!=0)
            {
                count++;
            }
        }
        return count;
    }
};

//another solution//


class Solution {
public:
    int countOdds(int low, int high) {
        int dif = high-low;
        if(high%2!=0 || low%2!=0)
        {
            return dif/2+1;
        }
        else
            return dif/2;
    }
};