#![allow(unused)]
#![allow(non_snake_case)]
#![allow(dead_code)]

fn main() {
   let input_str = std::io::read_to_string(std::io::stdin()).unwrap();
   let mut input = input_str.split_whitespace();
   let mut read_int = ||->usize {input.next().unwrap().parse().unwrap()};
   
   //差分列が回文ならYes
   let N = read_int();
   let A:Vec<usize> = (0..N).map(|_| read_int()).collect();
   let mut D = vec![];
   for i in 1..N{
       D.push(A[i]-A[i-1]);
   }
   let mut revD = D.clone();revD.reverse();
   println!("{}",if D == revD {"Yes"} else {"No"});
}