hdu1892（二维树状数组）

 

  1 #include<iostream>
  2 using namespace std;
  3 int a[1010][1010],c[1010][1010],n=1005;
  4 int lowbit(int x)
  5 {
  6     return x&(-x);
  7 }
  8 int sum(int x,int y)
  9 {
 10     int i,j,sum=0;
 11     for(i=x;i>0;i-=lowbit(i))
 12     {
 13         for(j=y;j>0;j-=lowbit(j))
 14         {
 15             sum+=c[i][j];
 16         }
 17     }
 18     return sum;
 19 }
 20 void inster(int x,int y,int z)
 21 {
 22     int i,j;
 23     for(i=x;i<=n;i+=lowbit(i))
 24     {
 25         for(j=y;j<=n;j+=lowbit(j))
 26         {
 27             c[i][j]+=z;
 28         }
 29     }
 30 }
 31 int main()
 32 {
 33     int x1,y1,x2,y2,t,m,i,j,n1,f=0;
 34     scanf("%d",&t);
 35     while(t--)
 36     {
 37         printf("Case %d:\n",++f);
 38         memset(a,0,sizeof(a));
 39         memset(c,0,sizeof(c));
 40         for(i=1;i<=n;i++)
 41             for(j=1;j<=n;j++)
 42             {
 43                 a[i][j]=1;
 44                 inster(i,j,1);
 45             }
 46         scanf("%d",&m);
 47         while(m--)
 48         {
 49             char s;
 50             getchar();
 51             s=getchar();
 52             if(s=='S')
 53             {
 54                 scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
 55                 x1++;x2++;y1++;y2++;
 56                 if(x1>x2)
 57                     swap(x1,x2);
 58                 if(y1>y2)
 59                     swap(y1,y2);
 60                 printf("%d\n",sum(x2,y2)-sum(x2,y1-1)-sum(x1-1,y2)+sum(x1-1,y1-1));
 61             }
 62             else
 63                 if(s=='A')
 64                 {
 65                     scanf("%d%d%d",&x1,&y1,&n1);
 66                     x1++;y1++;
 67                     inster(x1,y1,n1);
 68                     a[x1][y1]+=n1;
 69                 }
 70                 else
 71                     if(s=='D')
 72                     {
 73                         scanf("%d%d%d",&x1,&y1,&n1);
 74                         x1++;y1++;
 75                         if(n1>a[x1][y1])
 76                             n1=a[x1][y1];
 77                         inster(x1,y1,-n1);
 78                         a[x1][y1]-=n1;
 79                     }
 80                     else
 81                         if(s=='M')
 82                         {
 83                             scanf("%d %d %d %d %d",&x1,&y1,&x2,&y2,&n1);
 84                             x1++;y1++;x2++;y2++;
 85                             if(a[x1][y1]>=n1)
 86                             {
 87                                 a[x1][y1]-=n1;
 88                                 inster(x1,y1,-n1);
 89                                 inster(x2,y2,n1);
 90                                 a[x2][y2]+=n1;
 91                             }
 92                             else
 93                             {
 94                                 inster(x1,y1,-a[x1][y1]);
 95                                 inster(x2,y2,a[x1][y1]);
 96                                 a[x2][y2]+=a[x1][y1];
 97                                 a[x1][y1]=0;
 98                             }
 99                         }
100         }
101 
102     }
103     return 0;
104 }
105

 

 

http://acm.hdu.edu.cn/showproblem.php?pid=1892

 

posted @ 2012-11-22 16:04  紫忆  阅读(194)  评论(0)  编辑  收藏  举报