Compilare: user.cpp: In function ‘int main()’: user.cpp:28:18: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘ll {aka long long int}’ [-Wformat=] printf("%d",x); ^ user.cpp:21:44: 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:22:46: 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); ^ user.cpp:24:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&n); ^