Score : $100$ points

问题描述

你将获得一个字符串 $S$，它表示从明天开始连续七天的天气预报。
如果 $S$ 的第 $i$ 个字符为 o，则表示这七天中的第 $i$ 天预报为晴天；若该字符为 x，则表示预报为雨天。

请告诉我们第 $N$ 天是否预报为晴天。

以上为通义千问 qwen-max 翻译，仅供参考。

Problem Statement

You are given a string $S$, which represents a weather forecast for the seven days starting tomorrow.
The $i$-th of those seven days is forecast to be sunny if the $i$-th character of $S$ is o, and rainy if that character is x.

Tell us whether the $N$-th day is forecast to be sunny.

Constraints

• $N$ is an integer between $1$ and $7$ (inclusive).
• $S$ is a string of length $7$ consisting of o and x.

Input

Input is given from Standard Input in the following format:

$N$

$S$

Output

Print Yes if the $N$-th of the seven days starting tomorrow is forecast to be sunny, and No if that day is forecast to be rainy.

Sample Input 1

4
oooxoox

Sample Output 1

No

The forecast for each of the seven days starting tomorrow is as follows: sunny, sunny, sunny, rainy, sunny, sunny, rainy.
In particular, the fourth day is forecast to be rainy.

Sample Input 2

7
ooooooo

Sample Output 2

Yes

update @ 2024/3/10 09:38:20