foo.cc: In function ‘int main()’:
foo.cc:15:51: error: ‘cnt’ was not declared in this scope; did you mean ‘int’?
   15 |         for(int i=1;i<=n;i++)if(xiaomaomiwanju(i))cnt++;
      |                                                   ^~~
      |                                                   int
foo.cc:16:15: error: ‘cnt’ was not declared in this scope; did you mean ‘int’?
   16 |         cout<<cnt;
      |               ^~~
      |               int