Compilare: user.cpp: In function ‘std::pair<int, int> ExtendedEuclidean(int, int, int)’: user.cpp:43:27: warning: unused variable ‘a_0’ [-Wunused-variable] int aux = a_0 , a_0 = b_0 , b_0 = aux ; ^ user.cpp:43:39: warning: unused variable ‘b_0’ [-Wunused-variable] int aux = a_0 , a_0 = b_0 , b_0 = aux ; ^ user.cpp:46:18: warning: variable ‘gcd’ set but not used [-Wunused-but-set-variable] int q , r , gcd ; ^ user.cpp:75:1: warning: control reaches end of non-void function [-Wreturn-type] } ^