Compilare: main.cpp: In function 'std::vector<int> lca(const std::vector<std::vector<int> >&, const std::vector<std::pair<int, int> >&)': main.cpp:69:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for (int i = 0; i < tree.size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp:72:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for (int i = 0; i < queries.size(); i++) { | ~~^~~~~~~~~~~~~~~~ main.cpp:80:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 80 | if (index == tree[node].size()) { | ~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void print_data(std::vector<int>)': main.cpp:129:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 129 | for(int i = 0; i < res.size(); i++){ | ~~^~~~~~~~~~~~