tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:7:5: error: 'vector' was not declared in this scope
7 | vector<long long> s;
| ^~~~~~
tickets.cpp:7:5: note: suggested alternatives:
In file included from /usr/include/c++/9/vector:67,
from tickets.h:1,
from tickets.cpp:1:
/usr/include/c++/9/bits/stl_vector.h:386:11: note: 'std::vector'
386 | class vector : protected _Vector_base<_Tp, _Alloc>
| ^~~~~~
In file included from tickets.h:1,
from tickets.cpp:1:
/usr/include/c++/9/vector:90:13: note: 'std::pmr::vector'
90 | using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
| ^~~~~~
tickets.cpp:7:12: error: expected primary-expression before 'long'
7 | vector<long long> s;
| ^~~~
tickets.cpp:8:33: error: 's' was not declared in this scope
8 | for (int i = 0; i < n; i++) s.push_back(x[i][0]);
| ^
tickets.cpp:9:14: error: 's' was not declared in this scope
9 | sort(all(s));
| ^
tickets.cpp:9:10: error: 'all' was not declared in this scope
9 | sort(all(s));
| ^~~
tickets.cpp:9:5: error: 'sort' was not declared in this scope; did you mean 'short'?
9 | sort(all(s));
| ^~~~
| short
tickets.cpp:12:36: error: expected primary-expression before 'int'
12 | allocate_tickets(vector<vector<int> >(n, vector<int>(m)));
| ^~~
tickets.cpp:6:20: warning: unused variable 'm' [-Wunused-variable]
6 | int n = x.size(), m = x[0].size();
| ^