摘要：
Given a non-negative number represented as an array of digits, plus one to the number. The digits are stored such that the most significant digit is a 阅读全文
摘要：
就是简单的应用多数投票算法（Boyer–Moore majority vote algorithm），参见这道题的题解。 阅读全文
摘要：
题目： Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that 阅读全文
摘要：
Model.save(force_insert=False, force_update=False, using=DEFAULT_DB_ALIAS, update_fields=None) id和pk 如果一个model里没有显示声明哪一个字段（field）是主键（即在某个字段里声明primary_ 阅读全文