Eroare de compilare: user.cpp: In instantiation of ‘LinearFunSet<T>::LinearFunSet(std::vector<_Tp>) [with T = long long int]’: user.cpp:173:44: required from here user.cpp:69:42: error: ‘sort’ was not declared in this scope sort(slopes.begin(), slopes.end()); ^ user.cpp:70:58: error: ‘unique’ was not declared in this scope slopes.resize(unique(slopes.begin(), slopes.end()) - slopes.begin()); ^ user.cpp: In function ‘int main()’: user.cpp:154:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("euro.in", "r", stdin); ^ user.cpp:155:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("euro.out", "w", stdout); ^