class Solution {

public:

    int NumberOf1Between1AndN_Solution(int n)

    {

        if(n<=)

            return ;

        int count=;

        int i=;

        while(i<=n)

        {

            int p=i;

            while(p)

            {

                if(p%==)

                    count++;

                p=p/;

            }

            i++;

        }

        return count;

    }

};