标签:style blog http color os io for art
Mobile phones http://poj.org/problem?id=1195
1 #include<cstdio> 2 #include<cstring> 3 #define mt(a,b) memset(a,b,sizeof(a)) 4 const int M=1030; 5 class Two_Tree_Array { // 二维树状数组 6 typedef int typev; 7 typev c[M][M]; 8 public: 9 void init() { 10 mt(c,0); 11 } 12 int lowb(int t) { 13 return t&(-t); 14 } 15 void add(int x,int y,typev v) { 16 for(int i=x; i<M; i+=lowb(i)) 17 for(int j=y; j<M; c[i][j]+=v,j+=lowb(j)); 18 } 19 typev sum(int x,int y) { 20 typev res=0; 21 for(int i=x; i>0; i-=lowb(i)) 22 for(int j=y; j>0; res+=c[i][j],j-=lowb(j)); 23 return res; 24 } 25 typev query(int x1,int y1,int x2,int y2) { 26 return sum(x2,y2)-sum(x2,y1-1)-sum(x1-1,y2)+sum(x1-1,y1-1); 27 } 28 } gx; 29 int main(){ 30 int op,l,b,r,t,n; 31 while(~scanf("%d",&op),op!=3){ 32 if(!op){ 33 scanf("%d",&n); 34 gx.init(); 35 } 36 else if(op&1){ 37 scanf("%d%d%d",&l,&b,&op); 38 gx.add(l+1,b+1,op); 39 } 40 else{ 41 scanf("%d%d%d%d",&l,&b,&r,&t); 42 printf("%d\n",gx.query(l+1,b+1,r+1,t+1)); 43 } 44 } 45 return 0; 46 }
end
标签:style blog http color os io for art
原文地址:http://www.cnblogs.com/gaolzzxin/p/3884540.html