Special Permutation Coding Question-Codeforces rated 800

Placewit
2 min readFeb 13, 2022

Problem Statement :

You are given one integer n (n>1).

Recall that a permutation of length n is an array consisting of n distinct integers from 1 to n in arbitrary order. For example, [2,3,1,5,4] is a permutation of length 5, but [1,2,2] is not a permutation (2 appears twice in the array), and [1,3,4] is also not a permutation (n=3 but there is 4 in the array).

Your task is to find a permutation p of length n that there is no index i (1≤i≤n) such that pi=i(so, for all i from 1 to n the condition pi≠i should be satisfied).

You have to answer t independent test cases.

If there are several answers, you can print any. It can be proven that the answer exists for each n>1.

Input Format:

The first line of the input contains one integer tt (1≤t≤100) — the number of test cases. Then t test cases follow.

The only line of the test case contains one integer n (2≤n≤100) — the length of the permutation you have to find.

Output Format:

For each test case, print n distinct integers p1,p2,…,pn— a permutation that there is no index i (1≤i≤n) such that pi=i(so, for all I from 1 to n the condition pi≠i should be satisfied).

If there are several answers, you can print any. It can be proven that the answer exists for each n>1.

Given:

2
2
5

Output:

2 1
2 1 5 3 4

Code:

Thanks for Reading

Placewit grows the best engineers by providing an interactive classroom experience and by helping them develop their skills and get placed in amazing companies.

Learn more at Placewit. Follow us on Instagram and Facebook for daily learning.

--

--