/in/foo.cc: In function 'int main()':
/in/foo.cc:5:3: error: 'll' was not declared in this scope
   ll n = 0, a = 0, ans = 0;
   ^~
/in/foo.cc:6:18: error: the value of 'll' is not usable in a constant expression
   priority_queue<ll, vector<ll>, greater<ll> > pq;
                  ^~
/in/foo.cc:5:3: note: 'll' was not declared 'constexpr'
   ll n = 0, a = 0, ans = 0;
   ^~
/in/foo.cc:6:29: error: the value of 'll' is not usable in a constant expression
   priority_queue<ll, vector<ll>, greater<ll> > pq;
                             ^~
/in/foo.cc:5:3: note: 'll' was not declared 'constexpr'
   ll n = 0, a = 0, ans = 0;
   ^~
/in/foo.cc:6:31: error: type/value mismatch at argument 1 in template parameter list for 'template<class _Tp, class _Alloc> class std::vector'
   priority_queue<ll, vector<ll>, greater<ll> > pq;
                               ^
/in/foo.cc:6:31: note:   expected a type, got 'll'
/in/foo.cc:6:31: error: template argument 2 is invalid
/in/foo.cc:6:42: error: the value of 'll' is not usable in a constant expression
   priority_queue<ll, vector<ll>, greater<ll> > pq;
                                          ^~
/in/foo.cc:5:3: note: 'll' was not declared 'constexpr'
   ll n = 0, a = 0, ans = 0;
   ^~
/in/foo.cc:6:44: error: type/value mismatch at argument 1 in template parameter list for 'template<class _Tp> struct std::greater'
   priority_queue<ll, vector<ll>, greater<ll> > pq;
                                            ^
/in/foo.cc:6:44: note:   expected a type, got 'll'
/in/foo.cc:6:46: error: type/value mismatch at argument 1 in template parameter list for 'template<class _Tp, class _Sequence, class _Compare> class std::priority_queue'
   priority_queue<ll, vector<ll>, greater<ll> > pq;
                                              ^
/in/foo.cc:6:46: note:   expected a type, got 'll'
/in/foo.cc:6:46: error: template argument 2 is invalid
/in/foo.cc:6:46: error: template argument 3 is invalid
/in/foo.cc:7:10: error: 'n' was not declared in this scope
   cin >> n;
          ^
/in/foo.cc:9:12: error: 'a' was not declared in this scope
     cin >> a;
            ^
/in/foo.cc:10:8: error: request for member 'push' in 'pq', which is of non-class type 'int'
     pq.push(a);
        ^~~~
/in/foo.cc:13:5: error: 'a' was not declared in this scope
     a = pq.top(), pq.pop();
     ^
/in/foo.cc:13:12: error: request for member 'top' in 'pq', which is of non-class type 'int'
     a = pq.top(), pq.pop();
            ^~~
/in/foo.cc:13:22: error: request for member 'pop' in 'pq', which is of non-class type 'int'
     a = pq.top(), pq.pop();
                      ^~~
/in/foo.cc:14:13: error: request for member 'top' in 'pq', which is of non-class type 'int'
     a += pq.top(), pq.pop();
             ^~~
/in/foo.cc:14:23: error: request for member 'pop' in 'pq', which is of non-class type 'int'
     a += pq.top(), pq.pop();
                       ^~~
/in/foo.cc:15:5: error: 'ans' was not declared in this scope
     ans += a, pq.push(a);
     ^~~
/in/foo.cc:15:18: error: request for member 'push' in 'pq', which is of non-class type 'int'
     ans += a, pq.push(a);
                  ^~~~
/in/foo.cc:17:14: error: request for member 'empty' in 'pq', which is of non-class type 'int'
   while (!pq.empty()) {
              ^~~~~
/in/foo.cc:18:5: error: 'a' was not declared in this scope
     a = pq.top(), pq.pop();
     ^
/in/foo.cc:18:12: error: request for member 'top' in 'pq', which is of non-class type 'int'
     a = pq.top(), pq.pop();
            ^~~
/in/foo.cc:18:22: error: request for member 'pop' in 'pq', which is of non-class type 'int'
     a = pq.top(), pq.pop();
                      ^~~
/in/foo.cc:19:12: error: request for member 'empty' in 'pq', which is of non-class type 'int'
     if (pq.empty()) {
            ^~~~~
/in/foo.cc:22:15: error: request for member 'top' in 'pq', which is of non-class type 'int'
       a += pq.top(), pq.pop();
               ^~~
/in/foo.cc:22:25: error: request for member 'pop' in 'pq', which is of non-class type 'int'
       a += pq.top(), pq.pop();
                         ^~~
/in/foo.cc:23:15: error: request for member 'empty' in 'pq', which is of non-class type 'int'
       if (!pq.empty()) {
               ^~~~~
/in/foo.cc:24:17: error: request for member 'top' in 'pq', which is of non-class type 'int'
         a += pq.top(), pq.pop();
                 ^~~
/in/foo.cc:24:27: error: request for member 'pop' in 'pq', which is of non-class type 'int'
         a += pq.top(), pq.pop();
                           ^~~
/in/foo.cc:26:7: error: 'ans' was not declared in this scope
       ans += a, pq.push(a);
       ^~~
/in/foo.cc:26:20: error: request for member 'push' in 'pq', which is of non-class type 'int'
       ans += a, pq.push(a);
                    ^~~~
/in/foo.cc:29:11: error: 'ans' was not declared in this scope
   cout << ans << endl;
           ^~~