/in/foo.cc: In function 'int main(int, const char**)':
/in/foo.cc:31:20: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
         judge_n=o_n=0;
                 ~~~^~
/in/foo.cc:63:46: warning: array subscript has type 'char' [-Wchar-subscripts]
                 if(judge_variable[variable[i]]) 
                                              ^
/in/foo.cc:72:43: warning: array subscript has type 'char' [-Wchar-subscripts]
                 judge_variable[variable[i]]=1;
                                           ^
/in/foo.cc:88:52: warning: array subscript has type 'char' [-Wchar-subscripts]
                 judge_variable[variable[STACK[top]]]=0;
                                                    ^