Problem	dragonfly
User	IWKR
Submission Time	2023-02-10 14:46:20
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

cc1plus: error: ‘::main’ must return ‘int’
dragonfly.cpp: In function ‘int main()’:
dragonfly.cpp:32:31: error: no matching function for call to ‘std::vector<std::pair<long long int, long long int> >::push_back(long long int&)’
32 | adjlist[a].push_back(b);
| ^
In file included from /usr/include/c++/9/vector:67,
from /usr/include/c++/9/functional:62,
from /usr/include/c++/9/pstl/glue_algorithm_defs.h:13,
from /usr/include/c++/9/algorithm:71,
from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:65,
from dragonfly.cpp:1:
/usr/include/c++/9/bits/stl_vector.h:1184:7: note: candidate: ‘void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; std::vector<_Tp, _Alloc>