HDU 3584-Cube(三维BIT)

时间:2023-03-09 22:52:08
HDU 3584-Cube(三维BIT)

题意:

给你三维空间两种操作,给出两顶点坐标,把它们确定范围(长方体)内的数全部取反、查询给定点的值。初始全部为零

分析:

有了前面的知识,用BIT实现区间更新单点查询,再用多维实现即可

#include <map>
#include <set>
#include <list>
#include <cmath>
#include <queue>
#include <stack>
#include <cstdio>
#include <vector>
#include <string>
#include <cctype>
#include <complex>
#include <cassert>
#include <utility>
#include <cstring>
#include <cstdlib>
#include <iostream>
#include <algorithm>
using namespace std;
typedef pair<int,int> PII;
typedef long long ll;
#define lson l,m,rt<<1
#define pi acos(-1.0)
#define rson m+1,r,rt<<11
#define All 1,N,1
#define read freopen("in.txt", "r", stdin)
#define N 110
const ll INFll = 0x3f3f3f3f3f3f3f3fLL;
const int INF= 0x7ffffff;
const int mod = ;
int a[N][N][N],n,m;
int lowbit(int x){
return x&(-x);
}
void add(int x,int y,int z){
for(int i=x;i<=n;i+=lowbit(i))
for(int j=y;j<=n;j+=lowbit(j))
for(int k=z;k<=n;k=k+lowbit(k))
a[i][j][k]++;//统计奇偶性+1,-1一样
}
int sum(int x,int y,int z){
int num=;
for(int i=x;i>;i-=lowbit(i))
for(int j=y;j>;j-=lowbit(j))
for(int k=z;k>;k-=lowbit(k))
num+=a[i][j][k];
return num;
}
int main()
{
int op,x1,y1,z1,x2,y2,z2;
while(~scanf("%d%d",&n,&m)){
memset(a,,sizeof(a));
while(m--){
scanf("%d",&op);
if(op==){
scanf("%d%d%d%d%d%d",&x1,&y1,&z1,&x2,&y2,&z2);
add(x1,y1,z1);
add(x1,y1,z2+);
add(x2+,y1,z1);
add(x1,y2+,z1);
add(x2+,y2+,z1);
add(x2+,y1,z2+);
add(x1,y2+,z2+);
add(x2+,y2+,z2+);
}
else{
scanf("%d%d%d",&x1,&y1,&z1);
printf("%d\n",sum(x1,y1,z1)%);
}
}
}
return ;
}