摘要：
LeetCode 560. Subarray Sum Equals K 题目描述 Given an array of integers nums and an integer k, return the total number of continuous subarrays whose sum e 阅读全文
摘要：
LeetCode 973. K Closest Points to Origin 题目描述 Given an array of points where points[i] = [xi, yi] represents a point on the X-Y plane and an integer k 阅读全文