Compilare: main.cpp: In function 'int parcurgere_euleriana(int, int, std::vector<std::vector<int> >, std::vector<int>&, std::vector<int>&, std::vector<int>&, std::vector<int>&, int&)': main.cpp:49:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vecini[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void lca(const std::vector<std::vector<int> >&, const std::vector<std::pair<int, int> >&)': main.cpp:181:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < 4*graph.size() + 10; i++) ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:205:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < queries.size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:219:22: 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:255:14: warning: unused variable 'y' [-Wunused-variable] int x, y; ^