Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:35:34: 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:91:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vecb.size();i++){ ^ user.cpp:111:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<veca.size();i++) ^ user.cpp:113:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vecb.size();i++) ^ user.cpp:120:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vecb.size();i++){ ^ user.cpp:142:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<veca.size();i++) ^ user.cpp:144:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vecb.size();i++) ^