Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:11:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int DFS2(int)’: user.cpp:22:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:67:19: warning: ‘x3’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(d[x2][x3]==x3)q[3]-=q[2]; ^ user.cpp:67:19: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:66:19: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(d[x1][x3]==x3)q[3]-=q[1]; ^