Compilare: main.cpp: In function 'void BFS(int, bool*, std::vector<std::vector<int> >, int)': main.cpp:23:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < adj[vertice].size(); i++) { ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:32: warning: unused variable 'conexe' [-Wunused-variable] int vertices, i, from, to, conexe = 0, j, edges, nod; ^~~~~~ main.cpp:45:44: warning: unused variable 'j' [-Wunused-variable] int vertices, i, from, to, conexe = 0, j, edges, nod; ^