运行 ID: 37640

Main.cc:3:1: error: ‘priority_queue’ does not name a type
 priority_queuepq;
 ^~~~~~~~~~~~~~
Main.cc: In function ‘int main()’:
Main.cc:6:5: error: ‘cin’ was not declared in this scope
     cin>>n;
     ^~~
Main.cc:6:5: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:75:0,
                 from Main.cc:2:
/usr/include/c++/7/iostream:60:18: note:   ‘std::cin’
   extern istream cin;  /// Linked to standard input
                  ^~~
Main.cc:10:9: error: ‘pq’ was not declared in this scope
         pq.push(a);pq.push(a-b);
         ^~
Main.cc:12:15: error: ‘pq’ was not declared in this scope
     int ans = pq.top();
               ^~
Main.cc:14:5: error: ‘cout’ was not declared in this scope
     cout<& __os)
     ^~~~