fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let mut a: Vec<usize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();

    while !a.is_empty() && a[a.len()-1] == 0 {
        a.pop();
    }
    if a.is_empty() {
        println!("Yes");
        return;
    }
    let n = a.len();
    let mut pop_cnt = 0usize;
    let mut idx = n-1;
    while !a.is_empty() {
        if (a[idx] + pop_cnt) % (idx+1) == 0 {
            let val = a.pop().unwrap();
            pop_cnt += (val + pop_cnt) / (idx+1);
        } else {
            println!("No");
            return;
        }
        if idx > 0 {
            idx -= 1;
        }
    }
    println!("Yes");
}