View Compilation Error

0_0_32109957_24905.cpp: In function 'bool judge(std::string)':
0_0_32109957_24905.cpp:58:13: error: base operand of '->' is not a pointer
         if(p->tail!=0){
             ^
0_0_32109957_24905.cpp:64:13: error: base operand of '->' is not a pointer
          p=p->next[s[i]-'a'];
             ^