Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:12:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Lista[nc].size();i++){ ^ user.cpp:20:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Lista[nc].size();i++){ ^ user.cpp: In function ‘void afisare(int)’: user.cpp:35:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Lista[nc].size();i++){ ^