/in/foo.cc: In function 'bool judge(int)':
/in/foo.cc:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<A[var].size();i++)
                 ~^~~~~~~~~~~~~~
/in/foo.cc:17:46: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
         if(judge(A[var][i])==0) return f[var]=1;
                                        ~~~~~~^~