Count Odd Numbers in an Interval Range
Problem Statement - link #
Given two non-negative integers low and high. Return the count of odd numbers between low and high (inclusive).
Examples #
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 #
class Solution {
public:
int countOdds(int low, int high) {
int tot = high - low + 1;
int res = 0;
if(tot % 2 && low % 2) {
res = (tot + 1) / 2;
}
else {
res = tot / 2;
}
return res;
}
};