import std.conv, std.functional, std.range, std.stdio, std.string; import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std.typecons; import core.bitop; class EOFException : Throwable { this() { super("EOF"); } } string[] tokens; string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; } int readInt() { return readToken.to!int; } long readLong() { return readToken.to!long; } string COLOR(string s = "") { return "\x1b[" ~ s ~ "m"; } bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } } bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } } int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; } int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); } int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); } enum INF = 10L^^18; void main() { try { for (; ; ) { const N = readInt; const M = readInt; const K = readLong; auto A = new long[N]; foreach (u; 0 .. N) { A[u] = readLong; } auto B = new int[M]; foreach (i; 0 .. M) { B[i] = readInt - 1; } auto cost = new long[][](1 << N, 1 << N); foreach (h; 0 .. 1 << N) { for (int g = h; ; --g &= h) { foreach (u; 0 .. N) { const v0 = (u + 1) % N; const v1 = (u - 1 + N) % N; if ((g >> u & 1) && (!(h >> v0 & 1) || !(h >> v1 & 1))) { cost[h][g] += K; } } if (!g) break; } debug writefln("cost[%s] = %s", h, cost[h]); } // 1: s-side, 0: t-side auto crt = new long[1 << N]; foreach (h; 0 .. 1 << N) { foreach (u; 0 .. N) if (!(h >> u & 1)) crt[h] += A[u]; } foreach (b; B) { // INF or K { auto nxt = new long[1 << N]; nxt[] = INF; foreach (h; 0 .. 1 << N) { for (int g = h; ; --g &= h) { chmin(nxt[h], crt[g] + cost[h][g]); if (!g) break; } } debug writeln(nxt); crt = nxt; } // INF except for b { auto nxt = new long[1 << N]; nxt[] = INF; foreach (h; 0 .. 1 << N) { for (int g = h; ; --g &= h) { chmin(nxt[h], crt[g]); chmin(nxt[h], crt[g | 1 << b]); if (!g) break; } } debug writeln(nxt); crt = nxt; } // INF to 0 writeln(crt[0]); } } } catch (EOFException e) { } }