Compilare: user.cpp: In function ‘void bfs(int, int)’: user.cpp:27:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:70:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < code.size(); i++) ^ user.cpp:75:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < crit.size(); i++) ^