Compilare: user.cpp: In function ‘int main()’: user.cpp:50:21: warning: unused variable ‘rasp’ [-Wunused-variable] long long n, i, rasp=1, f1=1, f2=1, f3=1; ^ user.cpp:48:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dirichlet.in", "r", stdin); ^ user.cpp:49:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dirichlet.out", "w", stdout); ^ user.cpp:51:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &n); ^