Compilare: main.cpp: In member function 'void intree::build(int, int)': main.cpp:35:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int i = 0; i < cur_vals.size();) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:37:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | while (i < cur_vals.size() && cur_vals[i] == v) { | ~~^~~~~~~~~~~~~~~~~