Compilare: main.cpp: In function 'void join(Node*, Node*)': main.cpp:29:14: warning: 'a_parent' may be used uninitialized [-Wmaybe-uninitialized] 29 | a->parent=a_parent; | ~~~~~~~~~^~~~~~~~~ main.cpp:18:11: note: 'a_parent' was declared here 18 | Node* a_parent; | ^~~~~~~~ main.cpp: In function 'bool query(Node*, Node*)': main.cpp:48:22: warning: 'a_parent' may be used uninitialized [-Wmaybe-uninitialized] 48 | return a_parent==b_parent; | ^~~~~~~~ main.cpp:38:11: note: 'a_parent' was declared here 38 | Node* a_parent; | ^~~~~~~~ main.cpp:48:22: warning: 'b_parent' may be used uninitialized [-Wmaybe-uninitialized] 48 | return a_parent==b_parent; | ^~~~~~~~ main.cpp:39:11: note: 'b_parent' was declared here 39 | Node* b_parent; | ^~~~~~~~