Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:18:18: 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:53:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<Lista[nc].size();i++){ ^