cave.cpp: In function 'int rec(std::vector<int>)':
cave.cpp:14:35: error: 's' was not declared in this scope
14 | for(int j = 0; j <= mid; j++) s[pos[j]] ^= 1;
| ^
cave.cpp:15:29: error: 's' was not declared in this scope
15 | int ch = tryCombination(s);
| ^
cave.cpp:17:14: error: 'i' was not declared in this scope
17 | if(ch == i)
| ^
cave.cpp:19:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
19 | for(int j = mid+1; j < pos.size(); j++) nb.push_back(pos[j]);
| ~~^~~~~~~~~~~~
cave.cpp:25:25: error: no matching function for call to 'std::vector<int>::push_back(std::vector<int>&)'
25 | nb.push_back(pos);
| ^
In file included from /usr/include/c++/10/vector:67,
from /usr/include/c++/10/queue:61,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:86,
from cave.cpp:2:
/usr/include/c++/10/bits/stl_vector.h:1187:7: note: candidate: 'void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::value_type = int]'
1187 | push_back(const value_type& __x)
| ^~~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:1187:35: note: no known conversion for argument 1 from 'std::vector<int>' to 'const value_type&' {aka 'const int&'}
1187 | push_back(const value_type& __x)
| ~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_vector.h:1203:7: note: candidate: 'void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::value_type = int]'
1203 | push_back(value_type&& __x)
| ^~~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:1203:30: note: no known conversion for argument 1 from 'std::vector<int>' to 'std::vector<int>::value_type&&' {aka 'int&&'}
1203 | push_back(value_type&& __x)
| ~~~~~~~~~~~~~^~~