Compilare: user.cpp: In function ‘void df(int, int, int)’: user.cpp:14:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++){ ^ user.cpp: In function ‘void dfs(int, int)’: user.cpp:34:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:56:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[1].size();i++)if(parc[a[1][i]]==0){ ^