最小路径和
给定一个包含非负整数的 *m* x *n* 网格 grid ,请找出一条从左上角到右下角的路径,使得路径上的数字总和为最小。
**说明:**每次只能向下或者向右移动一步。
public int minPathSum(int[][] grid) {int[][] arr new int[grid.…
What is html2canvas ?
The script allows you to take “screenshots” of webpages or parts of it, directly on the users browser. The screenshot is based on the DOM and as such may not be 100% accurate to the real representation as it does not mak…
1、查询重复数据
SELECT a.*
FROM table_a a
INNER JOIN (SELECT id_customerFROM table_aGROUP BY id_customerHAVING COUNT(*) > 1
) b ON a.id_customer b.id_customer;说明:
子查询(子选择b)选择所有id_customer并计算每个id_custo…