Compilare: user.cpp: In function ‘std::vector<int> brut(std::vector<int>, int)’: user.cpp:11:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i+1 < v.size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:29:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kbubblesort.in", "r", stdin); ^ user.cpp:30:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kbubblesort.out", "w", stdout); ^