Compilare: user.cpp: In function ‘int Check(int, i64)’: user.cpp:64:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] BIT[++BIT[0]] = (value & 1); ^ user.cpp: In function ‘int main()’: user.cpp:142:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (Ones(left) == left.size()) { ^ user.cpp:144:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (rz < left.size()) { ^ user.cpp:157:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < left.size(); ++j) { ^ user.cpp:169:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < left.size(); ++j) { ^ user.cpp:194:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((_num & 1) != B[pos] - '0') { ^ user.cpp:101:54: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infinitepatternmatching.in", "r", stdin); ^ user.cpp:102:56: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infinitepatternmatching.out", "w", stdout); ^ user.cpp:103:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("debug.err", "w", stderr); ^