Compilare: main.cpp: In function 'void get_lca(std::vector<std::vector<int> >&, std::vector<std::vector<int> >&, std::vector<int>&, std::vector<int>&)': main.cpp:50:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for (int i = 0; i < lca[0].size(); ++i) { | ~~^~~~~~~~~~~~~~~ main.cpp:58:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for (int j = 0; j < lca[0].size(); ++j) { | ~~^~~~~~~~~~~~~~~ main.cpp:59:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | if (j + (1 << (i - 1)) >= lca[0].size()) { | ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void get_great(std::vector<int>, std::vector<std::unordered_map<int, int> >&, std::vector<std::vector<int> >&, std::vector<std::vector<std::pair<int, int> > >&)': main.cpp:76:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for (int i = 0; (1 << i) < stk.size(); ++i) { | ~~~~~~~~~^~~~~~~~~~~~