题目#include<iostream>usingnamespacestd;constintN=1010;intn,m,q;inta[N][N],b[N][N];voidinsert(intx1,inty1,intx2,inty2,intc){b[x1][y1]+=c;b[x2+1][y1]-=c;b[x1][y2+1]-=c;b[x2+1][y2+1]+=

二维差分模板题https://www.acwing.com/problem/content/800/同一维差分一样的思想,重要的也是时刻保证a[i]=b[0]+b[1]+...+b[i]在二维则是:a[i][j]=b[0][0]+b[0][1]+...b[

删除选中功能分析 voiddelSelectedUser(String[]ids);//删除选中==========@OverridepublicvoiddelSelectedUser(String[]ids){if(ids!=nu