Compilare: user.cpp: In function ‘int main()’: user.cpp:93:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int ind = 0; ind < Hull.size(); ++ind) { ^ user.cpp:120:7: warning: unused variable ‘ind’ [-Wunused-variable] ld ind = indices[i]; ^ user.cpp:63:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.in", "r", stdin); ^ user.cpp:64:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.out", "w", stdout); ^