Compilare: user.cpp: In function ‘int binarySearch(std::vector<int>&, int)’: user.cpp:29:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(best + (1<<step) < v.size() && v[best + (1<<step)] <= value) best += (1<<step); ~~~~~~~~~~~~~~~~~^~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:106:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secventa.out", "w", stdout); ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:50:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^