/in/foo.cc: In member function 'void PalindromicTree::insert(char)':
/in/foo.cc:37:24: warning: array subscript has type 'char' [-Wchar-subscripts]
         if(!next[cur][c])
                        ^
/in/foo.cc:40:49: warning: array subscript has type 'char' [-Wchar-subscripts]
             fail[now]=next[getfail(fail[cur])][c];
                                                 ^
/in/foo.cc:41:24: warning: array subscript has type 'char' [-Wchar-subscripts]
             next[cur][c]=now;
                        ^
/in/foo.cc:44:25: warning: array subscript has type 'char' [-Wchar-subscripts]
         last=next[cur][c];
                         ^