foo.cc:3:29: error: 'vector' does not name a type
    3 | struct SegmentTree { int n; vector<ll> st, lazy;
      |                             ^~~~~~
foo.cc:10:39: error: 'vector' does not name a type
   10 | void build(int p, int l, int r, const vector<ll>& a) {
      |                                       ^~~~~~
foo.cc:10:45: error: expected ',' or '...' before '<' token
   10 | void build(int p, int l, int r, const vector<ll>& a) {
      |                                             ^
foo.cc:21:19: error: 'll' has not been declared
   21 | void apply(int p, ll val) {
      |                   ^~
foo.cc:34:48: error: 'll' has not been declared
   34 | void update(int p, int l, int r, int i, int j, ll val) {
      |                                                ^~
foo.cc:47:1: error: 'll' does not name a type
   47 | ll query(int p, int l, int r, int i, int j) {
      | ^~
foo.cc: In constructor 'SegmentTree::SegmentTree(int)':
foo.cc:6:5: error: 'st' was not declared in this scope; did you mean 'std'?
    6 |     st.assign(4*n+4, 0);
      |     ^~
      |     std
foo.cc:7:5: error: 'lazy' was not declared in this scope
    7 |     lazy.assign(4*n+4, 0);
      |     ^~~~
foo.cc: In member function 'void SegmentTree::build(int, int, int, int)':
foo.cc:12:9: error: 'st' was not declared in this scope; did you mean 'std'?
   12 |         st[p] = a[l];
      |         ^~
      |         std
foo.cc:12:17: error: 'a' was not declared in this scope
   12 |         st[p] = a[l];
      |                 ^
foo.cc:16:23: error: 'a' was not declared in this scope
   16 |     build(p<<1, l, m, a);
      |                       ^
foo.cc:18:5: error: 'st' was not declared in this scope; did you mean 'std'?
   18 |     st[p] = max(st[p<<1], st[p<<1|1]);
      |     ^~
      |     std
foo.cc:18:13: error: 'max' was not declared in this scope; did you mean 'std::max'?
   18 |     st[p] = max(st[p<<1], st[p<<1|1]);
      |             ^~~
      |             std::max
In file included from /usr/include/c++/13/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51,
                 from foo.cc:1:
/usr/include/c++/13/bits/stl_algo.h:5805:5: note: 'std::max' declared here
 5805 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
foo.cc: In member function 'void SegmentTree::apply(int, int)':
foo.cc:22:5: error: 'st' was not declared in this scope; did you mean 'std'?
   22 |     st[p] += val;
      |     ^~
      |     std
foo.cc:23:5: error: 'lazy' was not declared in this scope
   23 |     lazy[p] += val;
      |     ^~~~
foo.cc: In member function 'void SegmentTree::push(int)':
foo.cc:27:9: error: 'lazy' was not declared in this scope
   27 |     if (lazy[p] != 0) {
      |         ^~~~
foo.cc: In member function 'void SegmentTree::update(int, int, int, int, int, int)':
foo.cc:44:5: error: 'st' was not declared in this scope; did you mean 'std'?
   44 |     st[p] = max(st[p<<1], st[p<<1|1]);
      |     ^~
      |     std
foo.cc:44:13: error: 'max' was not declared in this scope; did you mean 'std::max'?
   44 |     st[p] = max(st[p<<1], st[p<<1|1]);
      |             ^~~
      |             std::max
/usr/include/c++/13/bits/stl_algo.h:5805:5: note: 'std::max' declared here
 5805 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
foo.cc: In function 'int main()':
foo.cc:57:14: error: 'ios' has not been declared
   57 | int main() { ios::sync_with_stdio(false); cin.tie(NULL);
      |              ^~~
foo.cc:57:43: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   57 | int main() { ios::sync_with_stdio(false); cin.tie(NULL);
      |                                           ^~~
      |                                           std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:146:
/usr/include/c++/13/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
foo.cc:64:5: error: 'vector' was not declared in this scope
   64 |     vector<ll> a(N+1);
      |     ^~~~~~
foo.cc:64:5: note: suggested alternatives:
In file included from /usr/include/c++/13/vector:66,
                 from /usr/include/c++/13/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:53:
/usr/include/c++/13/bits/stl_vector.h:428:11: note:   'std::vector'
  428 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
/usr/include/c++/13/vector:86:13: note:   'std::pmr::vector'
   86 |       using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
      |             ^~~~~~
foo.cc:64:12: error: 'll' was not declared in this scope
   64 |     vector<ll> a(N+1);
      |            ^~
foo.cc:64:16: error: 'a' was not declared in this scope
   64 |     vector<ll> a(N+1);
      |                ^
foo.cc:76:15: error: expected ';' before 'X'
   76 |             ll X;
      |               ^~
      |               ;
foo.cc:77:20: error: 'X' was not declared in this scope
   77 |             cin >> X;
      |                    ^
foo.cc:80:15: error: expected ';' before 'ans'
   80 |             ll ans = st.query(1, 1, N, L, R);
      |               ^~~~
      |               ;
foo.cc:81:13: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   81 |             cout << ans << '\n';
      |             ^~~~
      |             std::cout
/usr/include/c++/13/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
foo.cc:81:21: error: 'ans' was not declared in this scope; did you mean 'abs'?
   81 |             cout << ans << '\n';
      |                     ^~~
      |                     abs