Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:16:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Lista[nc].size();i++){ ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:25:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Lista[nc].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:45:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(x=0;x<Lista[i].size();x++){ ^ user.cpp:50:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(x=0;x<Lista[i].size();x++) ^