/in/foo.cc: In function 'int main()':
/in/foo.cc:12:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<ss.size();i++){
              ~^~~~~~~~~~
/in/foo.cc:13:10: warning: array subscript has type 'char' [-Wchar-subscripts]
   c[ss[i]]++;
          ^
/in/foo.cc:20:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<s.size();i++)cc[s[i]]++;
               ~^~~~~~~~~
/in/foo.cc:20:37: warning: array subscript has type 'char' [-Wchar-subscripts]
   for(int i=0;i<s.size();i++)cc[s[i]]++;
                                     ^
/in/foo.cc:24:25: warning: array subscript has type 'char' [-Wchar-subscripts]
   ans=min(ans,cc[biao[i]]/c[biao[i]]);
                         ^
/in/foo.cc:24:36: warning: array subscript has type 'char' [-Wchar-subscripts]
   ans=min(ans,cc[biao[i]]/c[biao[i]]);
                                    ^