Web tile error analysis, web tile Error

Source: Internet
Author: User

Web tile error analysis, web tile Error

The instructor asked to create a jigsaw puzzle game on the web.

Problems found: After you click the randomly generated puzzle button, the disordered images cannot be restored.

Discovery process: each time a piece of puzzle is generated, it will test how it is spelled back. The result shows that sometimes it cannot be spelled back.

Mathematical Principle: If the parity of the inverse numbers of the two matrices is the same, one matrix will surely be able to obtain another matrix after several transformations.

Cause: the number of reverse orders of the randomly generated puzzle matrix and the initial matrix may be different.

Solution: since the first number of reverse orders of the matrix is 0 (even), you only need to determine the number of reverse orders of the disrupted matrix is even.

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