Compilare: main.cpp: In function 'int main()': main.cpp:66:7: warning: unused variable 'x' [-Wunused-variable] ll x, y, a, b; ^ main.cpp:66:10: warning: unused variable 'y' [-Wunused-variable] ll x, y, a, b; ^ main.cpp:64:43: 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); ^ main.cpp:65:45: 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); ^