Question

1523. Count Odd Numbers in an Interval Range

中文文档

Description

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

Solutions

Solution 1

class Solution:
  def countOdds(self, low: int, high: int) -> int:
    return ((high + 1) >> 1) - (low >> 1)

class Solution {
  public int countOdds(int low, int high) {
    return ((high + 1) >> 1) - (low >> 1);
  }
}

class Solution {
public:
  int countOdds(int low, int high) {
    return (high + 1 >> 1) - (low >> 1);
  }
};

func countOdds(low int, high int) int {
  return ((high + 1) >> 1) - (low >> 1)
}

function countOdds(low: number, high: number): number {
  return ((high + 1) >> 1) - (low >> 1);
}

impl Solution {
  pub fn count_odds(low: i32, high: i32) -> i32 {
    ((high + 1) >> 1) - (low >> 1)
  }
}

class Solution {
  /**
   * @param Integer $low
   * @param Integer $high
   * @return Integer
   */
  function countOdds($low, $high) {
    return ($high + 1 >> 1) - ($low >> 1);
  }
}

int countOdds(int low, int high) {
  return ((high + 1) >> 1) - (low >> 1);
}