View Compilation Error

0_0_39130013_3449.cpp: In function 'int main()':
0_0_39130013_3449.cpp:34:17: error: 'ne' was not declared in this scope; did you mean 'n'?
   34 |                 ne[i]=-1,e[i].top=e[i].bk=i;
      |                 ^~
      |                 n