Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:26:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a[varf].size();i++) ^ user.cpp: In function ‘void DFS_Rezolvare(int)’: user.cpp:35:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<b[varf].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:60:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<c[i].size();j++) ^