View Compilation Error

0_0_36528941_20215.cpp:84:2: error: 'ntt' does not name a type
 }ntt;
  ^
0_0_36528941_20215.cpp:86:6: error: redeclaration of 'int NTT::n'
 int n,K;
      ^
0_0_36528941_20215.cpp:34:9: note: previous declaration 'int NTT::n'
     int n,rev[N];
         ^
0_0_36528941_20215.cpp:179:1: error: expected '}' at end of input
 }
 ^
0_0_36528941_20215.cpp: In member function 'void NTT::DFT(long long int*, int)':
0_0_36528941_20215.cpp:74:28: error: a function-definition is not allowed here before '{' token
     void Cheng(LL *a,LL *b){
                            ^
0_0_36528941_20215.cpp: In member function 'void NTT::MAIN()':
0_0_36528941_20215.cpp:112:5: error: 'ntt' was not declared in this scope
     ntt.init(n+K);
     ^
0_0_36528941_20215.cpp: At global scope:
0_0_36528941_20215.cpp:179:1: error: expected unqualified-id at end of input
 }
 ^