Classification accuracy percent

A content-moderation model labels posts with integer category ids. The weekly report shows accuracy as a whole percent, rounded down. Given equal-length lists y_true and y_pred, count the positions where they agree and return floor(100 * correct / total) as an integer. If the lists are empty, return 0. Example: y_true = [1, 0, 2, 1], y_pred = [1, 0, 1, 1] has 3 of 4 correct, so return 75.