Compilare: user.cpp: In function ‘bool bfs()’: user.cpp:34:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < g[nod].size(); j++) { ~~^~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:56:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[n].size(); i++) { ~~^~~~~~~~~~~~~