Compilare: main.cpp: In function 'void join(Node*, Node*)': main.cpp:28:31: warning: 'b_parent' may be used uninitialized [-Wmaybe-uninitialized] 28 | if(a_parent->sz<b_parent->sz) { | ~~~~~~~~~~^~ main.cpp:19:11: note: 'b_parent' was declared here 19 | Node* b_parent; | ^~~~~~~~ main.cpp:28:18: warning: 'a_parent' may be used uninitialized [-Wmaybe-uninitialized] 28 | if(a_parent->sz<b_parent->sz) { | ~~~~~~~~~~^~ main.cpp:18:11: note: 'a_parent' was declared here 18 | Node* a_parent; | ^~~~~~~~ main.cpp: In function 'bool query(Node*, Node*)': main.cpp:46:22: warning: 'a_parent' may be used uninitialized [-Wmaybe-uninitialized] 46 | return a_parent==b_parent; | ^~~~~~~~ main.cpp:36:11: note: 'a_parent' was declared here 36 | Node* a_parent; | ^~~~~~~~ main.cpp:46:22: warning: 'b_parent' may be used uninitialized [-Wmaybe-uninitialized] 46 | return a_parent==b_parent; | ^~~~~~~~ main.cpp:37:11: note: 'b_parent' was declared here 37 | Node* b_parent; | ^~~~~~~~