Rating changes for the last round are temporarily rolled back. They will be returned soon.
×

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

В условии задачи недавно были сделаны правки. Просмотреть изменения.

×
C. Games with Rectangle

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputIn this task Anna and Maria play the following game. Initially they have a checkered piece of paper with a painted *n* × *m* rectangle (only the border, no filling). Anna and Maria move in turns and Anna starts. During each move one should paint inside the last-painted rectangle a new lesser rectangle (along the grid lines). The new rectangle should have no common points with the previous one. Note that when we paint a rectangle, we always paint only the border, the rectangles aren't filled.

Nobody wins the game — Anna and Maria simply play until they have done *k* moves in total. Count the number of different ways to play this game.

Input

The first and only line contains three integers: *n*, *m*, *k* (1 ≤ *n*, *m*, *k* ≤ 1000).

Output

Print the single number — the number of the ways to play the game. As this number can be very big, print the value modulo 1000000007 (10^{9} + 7).

Examples

Input

3 3 1

Output

1

Input

4 4 1

Output

9

Input

6 7 2

Output

75

Note

Two ways to play the game are considered different if the final pictures are different. In other words, if one way contains a rectangle that is not contained in the other way.

In the first sample Anna, who performs her first and only move, has only one possible action plan — insert a 1 × 1 square inside the given 3 × 3 square.

In the second sample Anna has as much as 9 variants: 4 ways to paint a 1 × 1 square, 2 ways to insert a 1 × 2 rectangle vertically, 2 more ways to insert it horizontally and one more way is to insert a 2 × 2 square.

Codeforces (c) Copyright 2010-2020 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Sep/25/2020 10:18:15 (i1).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|