A13375. Board Moves
编程题
普及/提高-
知识点
题目描述
You are given a board of size $n \times n$ , where $n$ is odd (not divisible by $2$ ). Initially, each cell of the board contains one figure.
In one move, you can select exactly one figure presented in some cell and move it to one of the cells sharing a side or a corner with the current cell, i.e. from the cell $(i, j)$ you can move the figure to cells:
- $(i - 1, j - 1)$ ;
- $(i - 1, j)$ ;
- $(i - 1, j + 1)$ ;
- $(i, j - 1)$ ;
- $(i, j + 1)$ ;
- $(i + 1, j - 1)$ ;
- $(i + 1, j)$ ;
- $(i + 1, j + 1)$ ;
Of course, you can not move figures to cells out of the board. It is allowed that after a move there will be several figures in one cell.
Your task is to find the minimum number of moves needed to get all the figures into one cell (i.e. $n^2-1$ cells should contain $0$ figures and one cell should contain $n^2$ figures).
You have to answer $t$ independent test cases.
In one move, you can select exactly one figure presented in some cell and move it to one of the cells sharing a side or a corner with the current cell, i.e. from the cell $(i, j)$ you can move the figure to cells:
- $(i - 1, j - 1)$ ;
- $(i - 1, j)$ ;
- $(i - 1, j + 1)$ ;
- $(i, j - 1)$ ;
- $(i, j + 1)$ ;
- $(i + 1, j - 1)$ ;
- $(i + 1, j)$ ;
- $(i + 1, j + 1)$ ;
Of course, you can not move figures to cells out of the board. It is allowed that after a move there will be several figures in one cell.
Your task is to find the minimum number of moves needed to get all the figures into one cell (i.e. $n^2-1$ cells should contain $0$ figures and one cell should contain $n^2$ figures).
You have to answer $t$ independent test cases.
输入格式
The first line of the input contains one integer $t$ ( $1 \le t \le 200$ ) — the number of test cases. Then $t$ test cases follow.
The only line of the test case contains one integer $n$ ( $1 \le n < 5 \cdot 10^5$ ) — the size of the board. It is guaranteed that $n$ is odd (not divisible by $2$ ).
It is guaranteed that the sum of $n$ over all test cases does not exceed $5 \cdot 10^5$ ( $\sum n \le 5 \cdot 10^5$ ).
The only line of the test case contains one integer $n$ ( $1 \le n < 5 \cdot 10^5$ ) — the size of the board. It is guaranteed that $n$ is odd (not divisible by $2$ ).
It is guaranteed that the sum of $n$ over all test cases does not exceed $5 \cdot 10^5$ ( $\sum n \le 5 \cdot 10^5$ ).
输出格式
For each test case print the answer — the minimum number of moves needed to get all the figures into one cell.
输入输出样例
输入 #1
3 1 5 499993
输出 #1
0 40 41664916690999888