Compilare: main.cpp: In function 'int parcurgere_euleriana(int, int)': main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < graph[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void lca(const std::vector<std::vector<int> >&, const std::vector<std::pair<int, int> >&)': main.cpp:84:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < queries.size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:91:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < queries.size(); i++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:105:14: warning: unused variable 'y' [-Wunused-variable] int x, y; ^