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北京大学《ACM-ICPC竞赛训练》暑期课面向全球招生。容量有限,报名从速!
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Parallelepiped walk
Time Limit: 1000MSMemory Limit: 10000K
Total Submissions: 829Accepted: 197

Description

Two points A(x1, y1, z1) and B(x2, y2, z2) are placed on the surface of parallelepiped P = {(x, y, z): 0 <= x <= L, 0 <= y <= W, 0 <= z <= H} with L*W*H dimensions (see figure). These two points can be linked with various curves lying on the surface of P. You are to find out the square of the shortest curve length.

Parallelepiped dimensions L, W, H and coordinates of the points are integers, 0 <= L,W,H <= 1000.

Input

Input contains (in indicated order): L, W, H, x1, y1, z1, x2, y2, z2. The numbers are separated with spaces and end-of-line characters.

Output

Output should contain the square of the shortest curve length between points A and B on the surface of P.

Sample Input

5 5 2
3 1 2
3 5 0

Sample Output

36

Source

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