Description
平面上有n个点(xi,yi);
有m个询问，每个询问给定一个矩形[x1, x2]*[y1, y2],询问矩形中有多少个点。
Input
第一行两个整数n, m(1 <= n, m <= 2*105)
接下来n行每行两个整数xi, yi(1 <= xi, yi <= 109)
接下来m行每行四个整数x1, x2, y1, y2(1 <= x1<=x2<=109, 1<=y1<=y2<=109);
5 5
1 3
2 5
3 2
4 4
5 1
1 5 1 5
2 4 3 5
1 3 2 5
100 100 100 100
1 1 3 3