static int wing=[]()

 {

     std::ios::sync_with_stdio(false);

     cin.tie(NULL);

     return ;

 }();

 class Solution

 {

 public:

     int countPrimeSetBits(int L, int R)

     {

         int res=;

         for(int k=L;k<=R;k++)

         {

             int cur=countone(k);

             if(judgeprime(cur))

                 res++;

         }

         return res;

     }

     int countone(int i)

     {

         int count=;

         while(i)

         {

             count++;

             i&=i-;

         }

         return count;

     }

     bool judgeprime(int i)

     {

         if(i==)

             return false;

         int last=sqrt(i);

         for(int j=;j<=last;j++)

         {

             if(i%j==)

                 return false;

         }

         return true;

     }

 };