answer.code: In function ‘long long int dfs(long long int)’:
answer.code:38:33: error: reference to ‘size’ is ambiguous
   38 |                                 size[x]-=2;
      |                                 ^~~~
In file included from /usr/include/c++/13/string:53,
                 from /usr/include/c++/13/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:52,
                 from answer.code:1:
/usr/include/c++/13/bits/range_access.h:274:5: note: candidates are: ‘template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])’
  274 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/13/bits/range_access.h:264:5: note:                 ‘template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)’
  264 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
answer.code:8:54: note:                 ‘long long int size [500009]’
    8 | ll n,m,number,dfn[N],cnt,dp[N],fa[N],vis[N],first[N],size[N];
      |                                                      ^~~~
answer.code:41:55: error: reference to ‘size’ is ambiguous
   41 |                                         else vis[y]=1,size[y]-=2;
      |                                                       ^~~~
/usr/include/c++/13/bits/range_access.h:274:5: note: candidates are: ‘template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])’
  274 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/13/bits/range_access.h:264:5: note:                 ‘template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)’
  264 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
answer.code:8:54: note:                 ‘long long int size [500009]’
    8 | ll n,m,number,dfn[N],cnt,dp[N],fa[N],vis[N],first[N],size[N];
      |                                                      ^~~~
answer.code: In function ‘int main()’:
answer.code:55:41: error: reference to ‘size’ is ambiguous
   55 |                         first[i]=vis[i]=size[i]=dfn[i]=fa[i]=0;
      |                                         ^~~~
/usr/include/c++/13/bits/range_access.h:274:5: note: candidates are: ‘template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])’
  274 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/13/bits/range_access.h:264:5: note:                 ‘template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)’
  264 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
answer.code:8:54: note:                 ‘long long int size [500009]’
    8 | ll n,m,number,dfn[N],cnt,dp[N],fa[N],vis[N],first[N],size[N];
      |                                                      ^~~~
answer.code:61:25: error: reference to ‘size’ is ambiguous
   61 |                         size[x]++,size[y]++;
      |                         ^~~~
/usr/include/c++/13/bits/range_access.h:274:5: note: candidates are: ‘template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])’
  274 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/13/bits/range_access.h:264:5: note:                 ‘template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)’
  264 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
answer.code:8:54: note:                 ‘long long int size [500009]’
    8 | ll n,m,number,dfn[N],cnt,dp[N],fa[N],vis[N],first[N],size[N];
      |                                                      ^~~~
answer.code:61:35: error: reference to ‘size’ is ambiguous
   61 |                         size[x]++,size[y]++;
      |                                   ^~~~
/usr/include/c++/13/bits/range_access.h:274:5: note: candidates are: ‘template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])’
  274 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/13/bits/range_access.h:264:5: note:                 ‘template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)’
  264 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
answer.code:8:54: note:                 ‘long long int size [500009]’
    8 | ll n,m,number,dfn[N],cnt,dp[N],fa[N],vis[N],first[N],size[N];
      |                                                      ^~~~
answer.code:65:54: error: reference to ‘size’ is ambiguous
   65 |                 for (ll i=1;i<=n;i++) ans=(ll)ans*dp[size[i]]%mod;
      |                                                      ^~~~
/usr/include/c++/13/bits/range_access.h:274:5: note: candidates are: ‘template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])’
  274 |    ...