Compilare: main.cpp: In function 'void genAll(int, std::vector<long long int>)': main.cpp:30:8: warning: unused variable 'add' [-Wunused-variable] ll add=f[tr]; ^~~ main.cpp: In function 'int main()': main.cpp:35:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("desc.in","r",stdin); ^ main.cpp:36:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("desc.out","w",stdout); ^ main.cpp:39:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %i",&n,&k); ^