using System; using System.Linq; class E { static int[] Read() => Array.ConvertAll(Console.ReadLine().Split(), int.Parse); static (int, int) Read2() { var a = Read(); return (a[0], a[1]); } static void Main() => Console.WriteLine(Solve()); static object Solve() { var (n, m) = Read2(); var a = Read(); var x = new int[m + 1]; int c = 1 << 20, t = 1; if (a[0] == a[1]) return "No"; x[a[0]] = c; x[a[1]] = c - t++; for (int i = 2; i < n; i++) { if (x[a[i]] == 0) { if (x[a[i - 2]] < x[a[i - 1]]) x[a[i]] = c - t++; else x[a[i]] = c + t++; } else { if (!IsKadomatsu(x, a, i - 2)) return "No"; } } return "Yes\n" + string.Join(" ", x.Skip(1).Select(v => v == 0 ? 1 : v)); } static bool IsKadomatsu(int[] x, int[] a, int i) => x[a[i]] != x[a[i + 2]] && (x[a[i]] < x[a[i + 1]] && x[a[i + 1]] > x[a[i + 2]] || x[a[i]] > x[a[i + 1]] && x[a[i + 1]] < x[a[i + 2]]); }