Given a polygon of $n$ of vertices and a point $A(x_A, x_B)$. Determine if $A$ lies inside the polygon (lying on an edge is also counted as lying inside).
### Input
- The first lines contains three integers $n, x_A, x_B$.
- The next $n$ lines, each line contains a point $(x, y)$. The points are listed in the clockwise order.
### Output
- Print `YES` if the point lies inside the polygon, otherwise print `NO`.
### Constraints
- $ 1 \le n \le 1000$.
- $-10^9 \le x, y \le 10^9$.
### Example
Input:
```
4 2 1
0 0
0 1
1 2
3 0
```
Output:
```
YES
```
