Compilare: user.cpp: In function ‘void count_sort(std::vector<int>&, std::vector<int>&, int)’: user.cpp:81:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<B.size(); ++i){ ^ user.cpp: In function ‘int main()’: user.cpp:96:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.in", "r", stdin); ^ user.cpp:98:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.out", "w", stdout); ^