Compilare: user.cpp: In function ‘void Solve(long long int, int, int, long long int, std::vector<long long int>&, long long int&)’: user.cpp:43:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (cur == cur_primes.size ()) { ^ user.cpp: In function ‘int main()’: user.cpp:70:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pinex.in", "r", stdin); ^ user.cpp:72:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pinex.out", "w", stdout); ^