题目大意:维护一个矩阵,单点修改,子矩阵查询,不强制在线
CDQ分治裸题。。。逗我。。。
同BZOJ 1176 Mokia 题解见 http://blog.csdn.net/popoqqq/article/details/39672705
#include
#include
#include
#include
#define M 500500
using namespace std;
struct Query{
int x,y,type;
//type>0 修改
//type==-1 查询 正
//type==-3 查询 负
Query() {}
Query(int _,int __,int ___):
x(_),y(__),type(___) {}
}mempool[800800],*q[800800],*nq[800800];
int n,m,ans[800800];
int stack[200200],top;
bool Compare(Query *q1,Query *q2)
{
return q1->x < q2->x;
}
namespace BIT{
int c[M],tim[M],T;
inline void Update(int x,int y)
{
for(;x<=n;x+=x&-x)
{
if(tim[x]!=T)
tim[x]=T,c[x]=0;
c[x]+=y;
}
}
inline int Get_Ans(int x)
{
int re=0;
for(;x;x-=x&-x)
if(tim[x]==T)
re+=c[x];
return re;
}
}
void CDQ_Divide_And_Conquer(int l,int r)
{
using namespace BIT;
int i,j,mid=l+r>>1;
if(l==r) return ;
int l1=l,l2=mid+1;
for(i=l;i<=r;i++)
if(q[i]-mempool<=mid)
nq[l1++]=q[i];
else nq[l2++]=q[i];
memcpy(q+l,nq+l,sizeof(q[0])*(r-l+1) );
CDQ_Divide_And_Conquer(l,mid);
for(++T,j=l,i=mid+1;i<=r;i++)
{
for(;j<=mid&&q[j]->x<=q[i]->x;j++)
if(q[j]->type>0)
Update(q[j]->y,q[j]->type);
if(q[i]->type<0)
ans[q[i]-mempool]+=Get_Ans(q[i]->y)*(q[i]->type+2);
}
CDQ_Divide_And_Conquer(mid+1,r);
l1=l,l2=mid+1;
for(i=l;i<=r;i++)
{
if(l2>r||l1<=mid&&Compare(q[l1],q[l2]))
nq[i]=q[l1++];
else nq[i]=q[l2++];
}
memcpy(q+l,nq+l,sizeof(q[0])*(r-l+1) );
}
int main()
{
int i,j,x,y,z,x1,y1,x2,y2,p;
cin>>n;
while(1)
{
scanf("%d",&p);
if(p==1)
{
scanf("%d%d%d",&x,&y,&z);
++m,q[m]=&(mempool[m]=Query(x,y,z));
}
else if(p==2)
{
scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
stack[++top]=m;
++m,q[m]=&(mempool[m]=Query(x1-1,y1-1,-1));
++m,q[m]=&(mempool[m]=Query(x1-1,y2,-3));
++m,q[m]=&(mempool[m]=Query(x2,y1-1,-3));
++m,q[m]=&(mempool[m]=Query(x2,y2,-1));
}
else break;
}
sort(q+1,q+m+1,Compare);
CDQ_Divide_And_Conquer(1,m);
for(i=1;i<=top;i++)
{
int temp=0;
for(j=1;j<=4;j++)
temp+=ans[stack[i]+j];
printf("%d\n",temp);
}
return 0;
}