Compilare: user.cpp: In function ‘void compute(std::vector<int>, std::vector<int>, int*)’: user.cpp:48:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < ord.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:104:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitmutare.in", "r", stdin); ^ user.cpp:105:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitmutare.out", "w", stdout); ^