题:https://leetcode.com/problems/kth-largest-element-in-an-array/description/ 题目 Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not th
Sum 时间限制: 1000 ms | 内存限制: 65535 KB 难度: 2 描述 Consider the natural numbers from 1 to N. By associating to each number a sign (+ or -) and calculating the value of this expression we obtai
题目: Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example: 1 -> A2 -> B3 -> C...26 -> Z27 -> AA28 -> AB 题解: 想明白了就容易了。 求base-26的表达式,用A~Z表示
题目内容 https://leetcode-cn.com/problems/kth-largest-element-in-an-array/ Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth dis
解题思路: 快速选择,目标是找出数组中第 k 小(或第 k 大)的元素,而不是对整个数组进行排序。 (需要和快排进行区分,快排的目的是排序) 注意: i = l - 1, j = r + 1; 为什么要这么写?而不是 i = l; j = r ? 因为是先执行do语句的内容,一开始进循环就已经先i++或者j--了,所以进循环前需要-1和+1。 class Solution {pub
题目: Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. For example, Given [3,2,1,5,6,4] and k = 2, retur