Compilare: user.cpp: In function ‘bool bfs(int)’: user.cpp:34:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < e[nod].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:74:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < e[n].size(); i++) { ^ user.cpp:68:9: warning: unused variable ‘fl’ [-Wunused-variable] int fl = 0; ^