315. Count of Smaller Numbers After Self
題目: You are given an integer array nums and you have to return a new counts array. The counts array ...
題目: You are given an integer array nums and you have to return a new counts array. The counts array ...
分治法基礎 分治法(Divide and Conquer)顧名思義,思想核心是將問題拆分為子問題,對子問題求解、最終合並結果,分治法用偽代碼表示如下: 分治法簡單而言分三步 D ...
看起來很難,但是仔細想一下,實質就是二叉樹的中序遍歷的問題,中序遍歷有遞歸和非遞歸(至少兩種寫法)。 遞歸: 非遞歸 Divide a ...
題目: Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), incl ...
原題鏈接在這里:https://leetcode.com/problems/k-closest-points-to-origin/ 題目: We have a list of points on ...
(This problem is an interactive problem.) On the sea represented by a cartesian plane, each ship is ...
https://leetcode.com/problems/reverse-pairs/#/description 和315, 327是一類題。 分治法,合並的過程就是歸並排序,在歸並的過程中,對 ...