Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:21:27: error: expected primary-expression before ‘long’ long long lim_x = (sqrt(long double(1LL + 8LL * n)) - 1) /2; ^ user.cpp:34:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) ^ user.cpp:12:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("consecutive.in", "r", stdin); ^ user.cpp:13:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("consecutive.out", "w", stdout); ^