Compilare: user.cpp: In function ‘long long int egcd(long long int, long long int, long long int&, long long int&)’: user.cpp:14:8: warning: unused variable ‘aux’ [-Wunused-variable] ll d, aux, x0, y0; ^ user.cpp: In function ‘int main()’: user.cpp:29:5: warning: unused variable ‘i’ [-Wunused-variable] ll i, j; ^ user.cpp:29:8: warning: unused variable ‘j’ [-Wunused-variable] ll i, j; ^ user.cpp:32:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.in", "r", stdin); ^ user.cpp:34:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.out", "w", stdout); ^