foo.cc: In function 'int bl(int)':
foo.cc:12:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(i=0;i<strlen(A);i++)
           ~^~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:25:12: warning: unused variable 'h' [-Wunused-variable]
  int a,b,i,h,ss=0,c=0;
            ^

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