有工具在手，这题就是一个模板题，就是有点不清楚，最后问的是单个元素的值，它怎么sum求出来的

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cstdio>
using namespace std;

#define maxn 1005

int c[maxn][maxn];
int Row, Col;

inline int Lowbit(const int &x)
{
    return x & (-x);
}

int Sum(int i, int j)
{
    int tempj, sum = 0;
    while (i > 0)
    {
        tempj = j;
        while (tempj > 0)
        {
            sum += c[i][tempj];
            tempj -= Lowbit(tempj);
        }
        i -= Lowbit(i);
    }
    return sum;
}

void Update(int i, int j, int num)
{
    int tempj;
    while (i <= Row)
    {
        tempj = j;
        while (tempj <= Col)
        {
            c[i][tempj] += num;
            tempj += Lowbit(tempj);
        }
        i += Lowbit(i);
    }
}
int main()
{
    #ifndef ONLINE_JUDGE
		freopen("G:/1.txt","r",stdin);
		freopen("G:/2.txt","w",stdout);
	#endif
    int T;
	scanf("%d",&T);
	while(T--)
	{
	    memset(c,0,sizeof(c));
		int N,Q;scanf("%d%d",&N,&Q);getchar();
		Row=N;Col=N;
		for(int i=1;i<=Q;i++)
		{
			char ques;int a,b,c,d;
			scanf("%c ",&ques);//getchar();
			if(ques=='C')
			{
				scanf("%d%d%d%d",&a,&b,&c,&d);getchar();
				c++;d++;
				Update(a,b,1);
				Update(c,d,1);
				Update(c,b,-1);
				Update(a,d,-1);
			}
			else if(ques=='Q')
			{
				scanf("%d%d",&a,&b);getchar();
				printf("%d\n",1&Sum(a,b));
			}
		}
		printf("\n");
	}
}