/in/foo.cc:22:5: error: no matching function for call to 'node::node()'
   22 | }e[N];
      |     ^
/in/foo.cc:21:5: note: candidate: 'node::node(long long int, long long int, long long int)'
   21 |     node(ll T , ll F , ll N ) : v(T), fl(F), ne(N) {}
      |     ^~~~
/in/foo.cc:21:5: note:   candidate expects 3 arguments, 0 provided
/in/foo.cc:19:8: note: candidate: 'constexpr node::node(const node&)'
   19 | struct node {
      |        ^~~~
/in/foo.cc:19:8: note:   candidate expects 1 argument, 0 provided
/in/foo.cc:19:8: note: candidate: 'constexpr node::node(node&&)'
/in/foo.cc:19:8: note:   candidate expects 1 argument, 0 provided