CF1425C.Captain of Knights
普及/提高-
通过率:0%
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题目描述
Mr. Chanek just won the national chess tournament and got a huge chessboard of size N×M . Bored with playing conventional chess, Mr. Chanek now defines a function F(X,Y) , which denotes the minimum number of moves to move a knight from square (1,1) to square (X,Y) . It turns out finding F(X,Y) is too simple, so Mr. Chanek defines:
G(X,Y)=∑i=XN∑j=YMF(i,j)
Given X and Y, you are tasked to find G(X,Y) .
A knight can move from square (a,b) to square (a′,b′) if and only if ∣a−a′∣>0 , ∣b−b′∣>0 , and ∣a−a′∣+∣b−b′∣=3 . Of course, the knight cannot leave the chessboard.
输入格式
The first line contains an integer T (1≤T≤100) , the number of test cases.
Each test case contains a line with four integers X Y N M (3≤X≤N≤109,3≤Y≤M≤109) .
输出格式
For each test case, print a line with the value of G(X,Y) modulo 109+7 .
输入输出样例
输入#1
2 3 4 5 6 5 5 8 8
输出#1
27 70