二维树状数组的模板题 有几种操作: 0 S 新建一个S*S的表 1 X Y A 在 (0,0)到(X,Y)内的元素+A 2 L B R T 询问 L<=x<=R , B<=y<=T (x, y)区域的元素和 3 结束 #include <algorithm>#include <cstdio>#include <cstdlib>#include <cmath>#incl
题目链接:点击打开链接 Description Suppose that the fourth generation mobile phone base stations in the Tampere area operate as follows. The area is divided into squares. The squares form an S * S matrix wit
这是道模版题,直接套模版就好了。。。。 注意:我用的树状数组下标是从1开始的,而题目给定是从0开始的,所以有时要+1 #include<stdio.h> #define N 1100 int n; int bit[N][N]; void add(int x,int y,int v) { int i,j; for(i=x;i<=n;i+=i&-i)