using System; using System.Collections.Generic; using System.Linq; class D { static int[] Read() => Array.ConvertAll(Console.ReadLine().Split(), int.Parse); static (int, int) Read2() { var a = Read(); return (a[0], a[1]); } static long[] ReadL() => Array.ConvertAll(Console.ReadLine().Split(), long.Parse); static void Main() => Console.WriteLine(Solve() ? "Yes" : "No"); static bool Solve() { var n = int.Parse(Console.ReadLine()); var es = Read(); var sum = es.Sum(); if (sum % 3 != 0) return false; sum /= 3; var rn = Enumerable.Range(0, n).ToArray(); var ok = false; AllBoolCombination(n, b => { var s = 0; for (int i = 0; i < n; i++) { if (b[i]) { s += es[i]; } } if (s != sum) return false; var inds = Array.FindAll(rn, i => b[i]); var a = Array.ConvertAll(inds, i => es[i]); if (!Check2(a, sum)) return false; ok = true; return true; }); return ok; } static bool Check2(int[] a, int sum) { var n = a.Length; var ok = false; AllBoolCombination(n, b => { var s = 0; for (int i = 0; i < n; i++) { if (b[i]) { s += a[i]; } } if (s != sum) return false; ok = true; return true; }); return ok; } public static void AllBoolCombination(int n, Func action) { if (n > 30) throw new InvalidOperationException(); var pn = 1 << n; var b = new bool[n]; for (int x = 0; x < pn; ++x) { for (int i = 0; i < n; ++i) b[i] = (x & (1 << i)) != 0; if (action(b)) break; } } }