AT_abc474_b.Exit Order

There is a movie theater with $N$ seats numbered $1$ through $N$, and one customer is sitting in each seat.
As a measure against congestion, this theater has customers leave according to the following rule.

• Divide the customers into groups of $10$ people each, in increasing order of the seat number they are sitting in.
• The groups leave in order, starting from the group consisting of customers with the smallest seat numbers. Customers within the same group may leave in any order.

Here, the last group may have fewer than $10$ customers.

The customer who left $i$-th was the one sitting in seat $P_i$.
Determine whether the $N$ customers left according to the rule.

有一家电影院，共有 $N$ 个座位，编号为 $1$ 至 $N$，每个座位上均坐有一名顾客。
为缓解拥挤，该影院要求顾客按如下规则离场：

• 将顾客按其所坐座位编号从小到大的顺序，每 $10$ 人分为一组；
• 各组按顺序离场，即从座位编号最小的顾客所在的组开始；同一组内的顾客可按任意顺序离场。

注意：最后一组可能少于 $10$ 名顾客。

第 $i$ 个离场的顾客原本坐在座位 $P_i$ 上。
请判断这 $N$ 名顾客是否符合上述离场规则。

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

$N$
$P_1$ $P_2$ $\ldots$ $P_N$

输入从标准输入中按以下格式给出：

$N$
$P_1$ $P_2$ $\ldots$ $P_N$

Output Yes if the $N$ customers left according to the rule, and No otherwise, in one line.

如果 $N$ 位顾客按照规则离开，则输出 Yes，否则输出 No，结果占一行。

Sample 1 Explanation:
The $25$ customers were divided into three groups, with seat numbers $1$ to $10$, $11$ to $20$, and $21$ to $25$.
First, the $10$ customers in the first group, with seat numbers $1$ to $10$, left.
Next, the $10$ customers in the second group, with seat numbers $11$ to $20$, left.
Finally, the $5$ customers in the third group, with seat numbers $21$ to $25$, left.
Thus, the $25$ customers left according to the rule.

Constraints

• $10 \leq N \leq 100$
• $(P_1,P_2,\dots,P_N)$ is a permutation of $(1,2,\dots,N)$.
• All input values are integers.

样例 1 解释：
这 $25$ 名顾客被分为三组，座位号分别为 $1$ 至 $10$、$11$ 至 $20$ 和 $21$ 至 $25$。
首先，第一组（座位号 $1$ 至 $10$）的 $10$ 名顾客离开。
接着，第二组（座位号 $11$ 至 $20$）的 $10$ 名顾客离开。
最后，第三组（座位号 $21$ 至 $25$）的 $5$ 名顾客离开。
因此，这 $25$ 名顾客按照规则全部离开了。

约束条件

• $10 \leq N \leq 100$
• $(P_1,P_2,\dots,P_N)$ 是 $(1,2,\dots,N)$ 的一个排列。
• 所有输入值均为整数。