题目描述

On a m*m land stationed n troops, numbered from 1 to n. The i-th troop's position can be described by two numbers (xi,yi) (1<=xi<=m,1<=yi<=m). It is possible that more than one troop stationed in the same place. Then there are t minutes, in each minute one of the following two events will occur: (1)the x-th troop moves towards a direction( Up(U) Down(D) Left(L) Right(R))for d units;(You can suppose that the troops won't move out of the boundary) (2)the x-th troop needs to regroup the troops which stations in the same row or column with the x-th troop. That is, these troops need to move to the x-th troop's station. Suggest the cost of i-th troop moving to the j-th troop is (xi-xj)^2+(yi-yj)^2, every time a troop regroups, you should output the cost of the regrouping modulo 10^9+7.

输入格式

The first line: two numbers n,m(n<=100000,m<=10^18) Next n lines each line contain two numbers xi,yi(1<=xi,yi<=m) Next line contains a number t.(t<=100000) Next t lines, each line's format is one of the following two formats: (1)S x d, S∈{U,L,D,R}, indicating the first event(1<=x<=n,0<=d<m) (2)Q x, indicating the second event(1<=x<=n) In order to force you to answer the questions online, each time you read x', x=x'⊕lastans("⊕" means "xor"), where lastans is the previous answer you output. At the beginning lastans=0.

输出格式

Q lines, i-th line contain your answer to the i-th regrouping event.(modulo 10^9+7)

5 3
1 3
2 1
2 2
2 3
3 2
6
Q 1
L 0 2
L 5 2
Q 5
R 3 1
Q 3

1
1
7

提示

The input after decode: Q 1 L 1 2 L 4 2 Q 4 R 2 1 Q 2

题目来源

By 镇海中学