Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:12:30: error: invalid operands of types ‘__gnu_cxx::__promote_2<int, int, double, double>::__type {aka double}’ and ‘int’ to binary ‘operator%’ printf("%d",(n*pow(2,n)% 1000000009)); ^ user.cpp:8:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algebra2.in","r",stdin); ^ user.cpp:9:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algebra2.out","w",stdout); ^ user.cpp:11:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^