CF246A.Buggy Sorting

普及/提高-

通过率:0%

AC君温馨提醒

该题目为【codeforces】题库的题目,您提交的代码将被提交至codeforces进行远程评测,并由ACGO抓取测评结果后进行展示。由于远程测评的测评机由其他平台提供,我们无法保证该服务的稳定性,若提交后无反应,请等待一段时间后再进行重试。

题目描述

Little boy Valera studies an algorithm of sorting an integer array. After studying the theory, he went on to the practical tasks. As a result, he wrote a program that sorts an array of nn integers a1,a2,...,ana_{1},a_{2},...,a_{n} in the non-decreasing order. The pseudocode of the program, written by Valera, is given below. The input of the program gets number nn and array aa .

<br></br>loop integer variable $i$ from $1$ to $n-1$ <br></br>    loop integer variable $j$ from $i$ to $n-1$ <br></br>        if $(a_{j}&gt;a_{j+1})$ , then swap the values of elements $a_{j}$ and $a_{j+1}$ <br></br>But Valera could have made a mistake, because he hasn't yet fully learned the sorting algorithm. If Valera made a mistake in his program, you need to give a counter-example that makes his program work improperly (that is, the example that makes the program sort the array not in the non-decreasing order). If such example for the given value of nn doesn't exist, print -1.

输入格式

You've got a single integer nn (1<=n<=50)(1<=n<=50) — the size of the sorted array.

输出格式

Print nn space-separated integers a1,a2,...,ana_{1},a_{2},...,a_{n} (1<=ai<=100(1<=a_{i}<=100 ) — the counter-example, for which Valera's algorithm won't work correctly. If the counter-example that meets the described conditions is impossible to give, print -1.

If there are several counter-examples, consisting of nn numbers, you are allowed to print any of them.

输入输出样例

  • 输入#1

    1
    

    输出#1

    -1
    
首页