xinyu04

摘要： Given an array of integers nums and an integer k, return the total number of subarrays whose sum equals to k. A subarray is a contiguous non-empty seq 阅读全文

摘要： Design a data structure that follows the constraints of a Least Recently Used(LRU) cache. Implement the LRUCache class: LRUCache(int capacity) Initial 阅读全文