Difference Array
快手一面,面试官说来一题简单题,最后还问了时间复杂度:假设 k 个链表,共 n 个节点,时间复杂度是多少
Maximum product of "subarray" or "subsequence"
模运算的世界:当加减乘除遇上取模(模运算恒等式/费马小定理)
Monotonic Stack