Compilare: user.cpp: In function ‘void dfs(int, int, int)’: user.cpp:13:31: 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:38:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<sol[i].size();j++) ^ user.cpp:46:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<rez.size();i++) g<<rez[i]<<" "; ^