answer.code:27:19: error: ‘std::vector<std::pair<long long int, long long int> > link [100010]’ redeclared as different kind of entity
   27 | vector<pii> link[N];
      |                   ^
In file included from /usr/include/c++/13/bits/atomic_wait.h:44,
                 from /usr/include/c++/13/bits/atomic_base.h:42,
                 from /usr/include/c++/13/bits/shared_ptr_atomic.h:33,
                 from /usr/include/c++/13/memory:81,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:56,
                 from answer.code:2:
/usr/include/unistd.h:789:12: note: previous declaration ‘int link(const char*, const char*)’
  789 | extern int link (const char *__from, const char *__to)
      |            ^~~~
answer.code: In function ‘void sol()’:
answer.code:45:19: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   45 |             link[i].push_back({v, w});
      |                   ^
answer.code:45:21: error: request for member ‘push_back’ in ‘*(link + ((sizetype)i))’, which is of non-class type ‘int(const char*, const char*) noexcept’
   45 |             link[i].push_back({v, w});
      |                     ^~~~~~~~~
answer.code:50:33: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   50 |         for(auto [v, w] : link[u]) s[v].erase(s[v].find({f[u] + w, u}));
      |                                 ^
answer.code:50:33: error: ‘begin’ was not declared in this scope
answer.code:50:33: note: suggested alternatives:
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:166:
/usr/include/c++/13/valarray:1232:5: note:   ‘std::begin’
 1232 |     begin(const valarray<_Tp>& __va) noexcept
      |     ^~~~~
In file included from /usr/include/c++/13/bits/ranges_algobase.h:38,
                 from /usr/include/c++/13/bits/ranges_algo.h:38,
                 from /usr/include/c++/13/algorithm:63,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51:
/usr/include/c++/13/bits/ranges_base.h:489:44: note:   ‘std::ranges::__cust::begin’
  489 |     inline constexpr __cust_access::_Begin begin{};
      |                                            ^~~~~
In file included from /usr/include/c++/13/filesystem:50,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:200:
/usr/include/c++/13/bits/fs_dir.h:607:3: note:   ‘std::filesystem::__cxx11::begin’
  607 |   begin(recursive_directory_iterator __iter) noexcept
      |   ^~~~~
In file included from /usr/include/c++/13/bits/stl_iterator_base_types.h:71,
                 from /usr/include/c++/13/bits/stl_algobase.h:65,
                 from /usr/include/c++/13/algorithm:60:
/usr/include/c++/13/bits/iterator_concepts.h:969:10: note:   ‘std::ranges::__cust_access::begin’
  969 |     void begin(const auto&) = delete;
      |          ^~~~~
answer.code:50:33: error: ‘end’ was not declared in this scope
   50 |         for(auto [v, w] : link[u]) s[v].erase(s[v].find({f[u] + w, u}));
      |                                 ^
answer.code:50:33: note: suggested alternatives:
/usr/include/c++/13/valarray:1259:5: note:   ‘std::end’
 1259 |     end(const valarray<_Tp>& __va) noexcept
      |     ^~~
/usr/include/c++/13/bits/ranges_base.h:490:42: note:   ‘std::ranges::__cust::end’
  490 |     inline constexpr __cust_access::_End end{};
      |                                          ^~~
/usr/include/c++/13/bits/fs_dir.h:612:3: note:   ‘std::filesystem::__cxx11::end’
  612 |   end(recursive_directory_iterator) noexcept
      |   ^~~
/usr/include/c++/13/bits/ranges_base.h:137:10: note:   ‘std::ranges::__cust_access::end’
  137 |     void end(const auto&) = delete;
      |          ^~~
answer.code:59:33: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   59 |         for(auto [v, w] : link[u]) s[v].insert({f[u] + w, u});
      |                                 ^
answer.code:59:33: error: ‘begin’ was not declared in this scope
answer.code:59:33: note: suggested alternatives:
/usr/include/c++/13/valarray:1232:5: note:   ‘std::begin’
 1232 |     begin(const valarray<_Tp>& __va) noexcept
      |     ^~~~~
/usr/include/c++/13/bits/ranges_base.h:489:44: note:   ‘std::ranges::__cust::begin’
  489 |     inline constexpr __cust_access::_Begin begin{};
      |                                            ^~~~~
/usr/include/c++/13/bits/fs_dir.h:607:3: note:   ‘std::filesystem::__cxx11::begin’
  607 |   begin(recursive_directory_iterator __iter) noexcept
      |   ^~~~~
/usr/include/c++/13/bits/iterator_concepts.h:969:10: note:   ‘std::ranges::__cust_access::begin’
  969 |     void begin(const auto&) = delete;
      |          ^~~~~
answer.code:59:33: error: ‘end’ was not declared in this scope
   59 |         for(auto [v, w] : link[u]) s[v].insert({f[u] + w, u});
      |                                 ^
answer.code:59:33: note: suggested alternatives:
/usr/include/c++/13/valarray:1259:5: note:   ‘std::end’
 1259 |     end(const valarray<_Tp>& __va) noexcept
...