View Compilation Error

0_0_35598087_15505.cpp:4:10: error: 'lobn' does not name a type
 typedef  lobn long ll;
          ^
0_0_35598087_15505.cpp: In function 'int main()':
0_0_35598087_15505.cpp:7:2: error: 'll' was not declared in this scope
  ll n,x,y;
  ^
0_0_35598087_15505.cpp:8:7: error: 'n' was not declared in this scope
  cin>>n;
       ^
0_0_35598087_15505.cpp:9:42: error: 'x' was not declared in this scope
  for(int i=0;i<n-1;i++)scanf("%lld%lld",&x,&y);
                                          ^
0_0_35598087_15505.cpp:9:45: error: 'y' was not declared in this scope
  for(int i=0;i<n-1;i++)scanf("%lld%lld",&x,&y);
                                             ^