package main

import . "fmt"

func main() {
	var n int
	Scan(&n)
	a := make([]int, n)
	for i := range a {
		Scan(&a[i])
	}
	for i := 0; i < n; i++ {
		if a[i]+a[n-1-i] != a[0]+a[n-1] {
			Println("No")
			return
		}
	}
	Println("Yes")
}