Compilare: user.cpp: In function ‘int main()’: user.cpp:42: warning: unused variable ‘ok’ user.cpp: In function ‘void dfs(int)’: user.cpp:16: warning: ‘pos’ may be used uninitialized in this function user.cpp: In function ‘int main()’: user.cpp:42: warning: ‘poz’ may be used uninitialized in this function