Compilare: main.cpp: In function 'int parcurgere_euleriana(int, int)': main.cpp:28:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vecini[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'std::vector<int> lca(const std::vector<std::vector<int> >&, const std::vector<std::pair<int, int> >&)': main.cpp:76:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < graph.size(); ++i) { ~~^~~~~~~~~~~~~~ main.cpp:78:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < graph[i].size(); ++j) { ~~^~~~~~~~~~~~~~~~~ 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:115:12: warning: unused variable 'y' [-Wunused-variable] int x, y; ^