/in/foo.cc: In function 'int bl(int)':
/in/foo.cc:13:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(i=0;i<strlen(A);i++)
           ~^~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:26:12: warning: unused variable 'h' [-Wunused-variable]
  int a,b,i,h,ss=0,c=0;
            ^