Compilare: user.cpp: In function ‘int DFS(int, int)’: user.cpp:56:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < muchii[nod].size (); i++) ^ user.cpp: In function ‘int main()’: user.cpp:82:21: warning: unused variable ‘a’ [-Wunused-variable] int a = DFS (i, j); ^ user.cpp: In function ‘int DFS(int, int)’: user.cpp:68:1: warning: control reaches end of non-void function [-Wreturn-type] } ^