using System; using System.Collections.Generic; using System.Linq; using System.IO; using System.Threading; using System.Runtime.CompilerServices; using System.Text; using System.Diagnostics; using System.Numerics; using static System.Console; using static System.Convert; using static System.Math; using static Template; using SC = Scanner; public partial class Solver { public void Solve() { var N = sc.Int; var S = Create(N, () => sc.Str.ToCharArray()); var idx = Enumerable.Range(0, N).ToArray(); Array.Sort(idx, (a, b) => S[a].CompareTo(S[b])); var V = new int[N - 1]; for (int i = 0; i < N - 1; i++) { int lcp = 0; while (lcp < Min(S[idx[i]].Length, S[idx[i + 1]].Length) && S[idx[i]][lcp] == S[idx[i + 1]][lcp]) lcp++; V[i] = lcp; } var sp = new SparseTable(V, Min); int M; long X, D; sc.Make(out M, out X, out D); var res = 0L; for (int k = 0; k < M; k++) { int i = (int)(X / (N - 1)); int j = (int)(X % (N - 1)); if (i > j) swap(ref i, ref j); else j++; if (idx[i] > idx[j]) swap(ref i, ref j); X = (X + D) % ((long)N * (N - 1)); res += sp[idx[i], idx[j]]; } Console.WriteLine(res); } } public class SparseTable { private Func f; private T[][] table; private int[] len; T id; public T this[int l, int r] { get { if (l >= r) return id; return f(table[len[r - l]][l], table[len[r - l]][r - (1 << len[r - l])]); } } public SparseTable(IList A, Func f, T id = default(T)) { this.f = f; this.id = id; var mask = 0; while ((1 << mask) <= A.Count) mask++; table = Create(mask, () => new T[A.Count]); for (var i = 0; i < A.Count; i++) table[0][i] = A[i]; for (var i = 1; i < table.Length; i++) for (var j = 0; j + (1 << i) <= table[i - 1].Length; j++) table[i][j] = f(table[i - 1][j], table[i - 1][j + (1 << (i - 1))]); len = new int[A.Count + 1]; for (var i = 2; i < len.Length; i++) len[i] = len[i >> 1] + 1; } } #region Template public partial class Solver { public SC sc = new SC(); static void Main(string[] args) { Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false }); var sol = new Solver(); int testcase = 1; //testcase = sol.sc.Int; //var th = new Thread(sol.Solve, 1 << 26);th.Start();th.Join(); while (testcase-- > 0) sol.Solve(); Console.Out.Flush(); } } public static class Template { [MethodImpl(MethodImplOptions.AggressiveInlining)] public static bool chmin(ref T a, T b) where T : IComparable { if (a.CompareTo(b) > 0) { a = b; return true; } return false; } [MethodImpl(MethodImplOptions.AggressiveInlining)] public static bool chmax(ref T a, T b) where T : IComparable { if (a.CompareTo(b) < 0) { a = b; return true; } return false; } [MethodImpl(MethodImplOptions.AggressiveInlining)] public static void swap(ref T a, ref T b) { var t = b; b = a; a = t; } [MethodImpl(MethodImplOptions.AggressiveInlining)] public static void swap(this IList A, int i, int j) { var t = A[i]; A[i] = A[j]; A[j] = t; } public static T[] Create(int n, Func f) { var rt = new T[n]; for (var i = 0; i < rt.Length; ++i) rt[i] = f(); return rt; } public static T[] Create(int n, Func f) { var rt = new T[n]; for (var i = 0; i < rt.Length; ++i) rt[i] = f(i); return rt; } public static void Out(this IList A, out T a) => a = A[0]; public static void Out(this IList A, out T a, out T b) { a = A[0]; b = A[1]; } public static void Out(this IList A, out T a, out T b, out T c) { A.Out(out a, out b); c = A[2]; } public static void Out(this IList A, out T a, out T b, out T c, out T d) { A.Out(out a, out b, out c); d = A[3]; } public static string Concat(this IEnumerable A, string sp) => string.Join(sp, A); public static char ToChar(this int s, char begin = '0') => (char)(s + begin); public static IEnumerable Shuffle(this IEnumerable A) => A.OrderBy(v => Guid.NewGuid()); public static int CompareTo(this T[] A, T[] B, Comparison cmp = null) { cmp = cmp ?? Comparer.Default.Compare; for (var i = 0; i < Min(A.Length, B.Length); i++) { int c = cmp(A[i], B[i]); if (c > 0) return 1; else if (c < 0) return -1; } if (A.Length == B.Length) return 0; if (A.Length > B.Length) return 1; else return -1; } public static string ToStr(this T[][] A) => A.Select(a => a.Concat(" ")).Concat("\n"); public static int ArgMax(this IList A, Comparison cmp = null) { cmp = cmp ?? Comparer.Default.Compare; T max = A[0]; int rt = 0; for (int i = 1; i < A.Count; i++) if (cmp(max, A[i]) < 0) { max = A[i]; rt = i; } return rt; } public static T PopBack(this List A) { var v = A[A.Count - 1]; A.RemoveAt(A.Count - 1); return v; } public static void Fail(T s) { Console.WriteLine(s); Console.Out.Close(); Environment.Exit(0); } } public class Scanner { public string Str => Console.ReadLine().Trim(); public int Int => int.Parse(Str); public long Long => long.Parse(Str); public double Double => double.Parse(Str); public int[] ArrInt => Str.Split(' ').Select(int.Parse).ToArray(); public long[] ArrLong => Str.Split(' ').Select(long.Parse).ToArray(); public char[][] Grid(int n) => Create(n, () => Str.ToCharArray()); public int[] ArrInt1D(int n) => Create(n, () => Int); public long[] ArrLong1D(int n) => Create(n, () => Long); public int[][] ArrInt2D(int n) => Create(n, () => ArrInt); public long[][] ArrLong2D(int n) => Create(n, () => ArrLong); private Queue q = new Queue(); [MethodImpl(MethodImplOptions.AggressiveInlining)] public T Next() { if (q.Count == 0) foreach (var item in Str.Split(' ')) q.Enqueue(item); return (T)Convert.ChangeType(q.Dequeue(), typeof(T)); } public void Make(out T1 v1) => v1 = Next(); public void Make(out T1 v1, out T2 v2) { v1 = Next(); v2 = Next(); } public void Make(out T1 v1, out T2 v2, out T3 v3) { Make(out v1, out v2); v3 = Next(); } public void Make(out T1 v1, out T2 v2, out T3 v3, out T4 v4) { Make(out v1, out v2, out v3); v4 = Next(); } public void Make(out T1 v1, out T2 v2, out T3 v3, out T4 v4, out T5 v5) { Make(out v1, out v2, out v3, out v4); v5 = Next(); } public void Make(out T1 v1, out T2 v2, out T3 v3, out T4 v4, out T5 v5, out T6 v6) { Make(out v1, out v2, out v3, out v4, out v5); v6 = Next(); } public void Make(out T1 v1, out T2 v2, out T3 v3, out T4 v4, out T5 v5, out T6 v6, out T7 v7) { Make(out v1, out v2, out v3, out v4, out v5, out v6); v7 = Next(); } public (T1, T2) Make() { Make(out T1 v1, out T2 v2); return (v1, v2); } public (T1, T2, T3) Make() { Make(out T1 v1, out T2 v2, out T3 v3); return (v1, v2, v3); } public (T1, T2, T3, T4) Make() { Make(out T1 v1, out T2 v2, out T3 v3, out T4 v4); return (v1, v2, v3, v4); } } #endregion