/in/foo.cc: In function 'int main()':
/in/foo.cc:9:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<strlen(b);i++)
                ^
/in/foo.cc:11:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(cnt*2>=strlen(b))cout <<"Yes\n";
          ^