Compilare: user.cpp: In function ‘void Insert(int, int)’: user.cpp:89:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[i] == Set.size()) { ^ user.cpp:93:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[i] > Set.size()) ^ user.cpp: In function ‘void Erase(int, int)’: user.cpp:122:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[i] > Set.size()) { ^ user.cpp: In function ‘char Advance()’: user.cpp:27:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:140:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("moft.in", "r", stdin); ^ user.cpp:141:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("moft.out", "w", stdout); ^