Compilare: user.cpp: In function ‘int hash_find(const int&)’: user.cpp:56:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[KEY].size(); i ++) ^ user.cpp: In function ‘int main()’: user.cpp:137:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("autobuze.in", "r", stdin); ^