citymapping.cpp: In function 'void find_roads(int, int, int*, int*, int*)':
citymapping.cpp:6:2: error: 'vector' was not declared in this scope; did you mean 'std::vector'?
6 | vector<pair<int, pair<int, int>>> e;
| ^~~~~~
| std::vector
In file included from /usr/include/c++/10/vector:67,
from citymapping.cpp:2:
/usr/include/c++/10/bits/stl_vector.h:389:11: note: 'std::vector' declared here
389 | class vector : protected _Vector_base<_Tp, _Alloc>
| ^~~~~~
citymapping.cpp:6:9: error: 'pair' was not declared in this scope; did you mean 'std::pair'?
6 | vector<pair<int, pair<int, int>>> e;
| ^~~~
| std::pair
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
from /usr/include/c++/10/vector:60,
from citymapping.cpp:2:
/usr/include/c++/10/bits/stl_pair.h:211:12: note: 'std::pair' declared here
211 | struct pair
| ^~~~
citymapping.cpp:6:14: error: expected primary-expression before 'int'
6 | vector<pair<int, pair<int, int>>> e;
| ^~~