Score : $100$ points

问题描述

给定一个长度为 $N$ 的由小写英文字母组成的字符串 $S$。

如果在 $S$ 中存在相邻的 a 和 b，则输出 Yes；否则，输出 No。（a 和 b 的顺序无关紧要。）

以上为通义千问 qwen-max 翻译，仅供参考。

Problem Statement

You are given a string $S$ of length $N$ consisting of lowercase English letters. If there are any adjacent occurrences of a and b in $S$, print Yes; otherwise, print No. (The order of a and b does not matter.)

Constraints

• $2 \leq N \leq 100$
• $S$ is a string of length $N$ consisting of lowercase English letters.

Input

The input is given from Standard Input in the following format:

$N$

$S$

Output

If there are any adjacent occurrences of a and b in $S$, print Yes; otherwise, print No.

Sample Input 1

3
abc

Sample Output 1

Yes

The string abc has a as the first character and b as the second character, which are adjacent. Thus, print Yes.

Sample Input 2

2
ba

Sample Output 2

Yes

The string ba has a as the second character and b as the first character, which are adjacent. (Note that the order of a and b does not matter.)

Sample Input 3

7
atcoder

Sample Output 3

No

update @ 2024/3/10 01:50:29