Compilare: user.cpp: In function ‘void DFS(int, int, int)’: user.cpp:13:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int DFS1(int, int)’: user.cpp:18:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘void DFS2(int, int)’: user.cpp:24:14: 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:49:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[sef].size();i++) ^ user.cpp:62:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[q.second].size();i++) ^ user.cpp:33:8: warning: unused variable ‘j’ [-Wunused-variable] {int i,j,K; ^