/in/foo.cc:25:18: error: no matching function for call to 'node::node()'
 node Hash[MOD + 1];
                  ^
/in/foo.cc:18:5: note: candidate: node::node(int, int, int)
     node(int tx, int tstep, int tnxt) {
     ^~~~
/in/foo.cc:18:5: note:   candidate expects 3 arguments, 0 provided
/in/foo.cc:12:7: note: candidate: constexpr node::node(const node&)
 class node
       ^~~~
/in/foo.cc:12:7: note:   candidate expects 1 argument, 0 provided
/in/foo.cc:12:7: note: candidate: constexpr node::node(node&&)
/in/foo.cc:12:7: note:   candidate expects 1 argument, 0 provided