力扣第2180题

class Solution {
    
    

    /**
     * @param Integer $num
     * @return Integer
     */
    function countEven(int $num)
	{
    
    
		$sum = 0;
		for ($i = 2; $i <= $num; $i++) {
    
    
			if ($this->getNext($i)%2 == 0) {
    
    
				$sum++;
			}
		}
		return $sum;
	}
	
	public function getNext(int $n)
	{
    
    
		$sum = 0;
		while($n>0){
    
    
			$sum += $n%10;
			$n = floor($n/10);
		}
		return $sum;
	}
}