Problem Statement

There are $N$ boxes arranged in a circle. The $i$-th box contains $A_i$ stones.

Determine whether it is possible to remove all the stones from the boxes by repeatedly performing the following operation:

• Select one box. Let the box be the $i$-th box. Then, for each $j$ from $1$ through $N$, remove exactly $j$ stones from the $(i+j)$-th box. Here, the $(N+k)$-th box is identified with the $k$-th box.

Note that the operation cannot be performed if there is a box that does not contain enough number of stones to be removed.

Constraints

• $1 ≦ N ≦ 10^5$
• $1 ≦ A_i ≦ 10^9$

Input

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

N
A_1 A_2 … A_N

Output

If it is possible to remove all the stones from the boxes, print YES. Otherwise, print NO.