Compilare: main.cpp: In constructor 'node::node()': main.cpp:35:21: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null] 35 | this->key = NULL; | ^~~~ main.cpp: In member function 'void Fibonacci::merge_with_rootl(node*)': main.cpp:79:35: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 79 | if (this->root_list_start = nullptr) { | ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ main.cpp: In member function 'void Fibonacci::consolidate()': main.cpp:291:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 291 | for (int i = 0;i<=size(roots);i++) { | ~^~~~~~~~~~~~~