class Solution {
    public int subtractProductAndSum(int n) {
        
        int product = 1;
        int sum = 0;
        
        
        while ( n != 0) { 
            product = product * (n%10);
            sum = sum + (n%10);
            n = n/10;
        }
        
        
        return product - sum;
    }
}