bzoj 1452: [JSOI2009]Count ——二维树状数组

escription

Input

Output

Sample Input

Sample Output

1
2

HINT

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这道题是裸的二维树状数组.....直接每个颜色弄一个二维的树状数组然后容斥（也不知道算不算）就可以辣

#include<cstdio>
#include<cstring>
#include<algorithm>
int read(){
    int ans=0,f=1,c=getchar();
    while(c<'0'||c>'9'){if(c=='-') f=-1; c=getchar();}
    while(c>='0'&&c<='9'){ans=ans*10+(c-'0'); c=getchar();}
    return ans*f;
}
int n,m,q,k,f[357][357];
int s[107][357][357];
#define lowbit(x) x&-x
void ins(int b[357][357],int x,int y,int v){
    for(int i=x;i<=n;i+=lowbit(i))
    for(int j=y;j<=m;j+=lowbit(j)) b[i][j]+=v;
}
int query(int b[357][357],int x,int y){
    int sum=0;
    for(int i=x;i;i-=lowbit(i))
    for(int j=y;j;j-=lowbit(j)) sum+=b[i][j];
    return sum;
}
int main(){
    int x1,y1,x2,y2,c;
    n=read(); m=read();
    for(int i=1;i<=n;i++)
    for(int j=1;j<=m;j++) 
    k=read(),ins(s[k],i,j,1),f[i][j]=k;
    q=read();
    for(int i=1;i<=q;i++){
        k=read();
        if(k==1){
            x1=read(); y1=read(); c=read();
            ins(s[f[x1][y1]],x1,y1,-1);
            f[x1][y1]=c;
            ins(s[f[x1][y1]],x1,y1,1);
        }
        else{
            x1=read(); x2=read();
            y1=read(); y2=read();
            c=read();
            printf("%d
",query(s[c],x2,y2)-query(s[c],x2,y1-1)-query(s[c],x1-1,y2)+query(s[c],x1-1,y1-1));
        }
    }
    return 0;
}