Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void df(int, solutie&)’: user.cpp:38:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<t[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:44:15: warning: unused variable ‘j’ [-Wunused-variable] int i,x,y,j; ^