/in/foo.cc:6:1: error: 'll' does not name a type
 ll fib[maxn];
 ^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:9:2: error: 'fib' was not declared in this scope
  fib[1] = 1;
  ^~~
/in/foo.cc:13:6: error: 'read' was not declared in this scope
  n = read;
      ^~~~
/in/foo.cc:14:2: error: 'll' was not declared in this scope
  ll x,y;
  ^~
/in/foo.cc:16:3: error: 'x' was not declared in this scope
   x = read,y = read;
   ^
/in/foo.cc:16:12: error: 'y' was not declared in this scope
   x = read,y = read;
            ^