## Initial order of first $n$ numbers

### Initial order of first $n$ numbers

The integers $1,...,n$ are arranged in any order. In one step any two neighboring integers may be interchanged. Prove that the initial order can never be reached after an odd number of steps.

One one thing is neutral in the universe, that is $0$.

### Re: Initial order of first $n$ numbers

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Use $L^AT_EX$, It makes our work a lot easier!

Nur Muhammad Shafiullah | Mahi

Use $L^AT_EX$, It makes our work a lot easier!

Nur Muhammad Shafiullah | Mahi