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; } real readReal() { return readToken.to!real; } 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)); } int N; int[] A; bool solve() { auto freq = new int[N]; foreach (i; 0 .. 2 * N) { ++freq[A[i]]; } if (!freq.all!"a == 2") { return false; } int[] diffs; foreach (i; 0 .. 2 * N) { if (i % N != A[i]) { diffs ~= i; } } if (diffs.empty) { return true; } const l = diffs[0] - 1; const r = diffs[$ - 1] + 1; if (!(0 <= l && r < 2 * N && l + N == r)) { return false; } foreach (i; l + 1 .. r) { if (i % N != A[l + r - i]) { return false; } } return true; } void main() { try { for (; ; ) { const numCases = readInt; foreach (caseId; 0 .. numCases) { N = readInt; A = new int[2 * N]; foreach (i; 0 .. 2 * N) { A[i] = readInt - 1; } const ans = solve; writeln(ans ? "Yes" : "No"); } } } catch (EOFException e) { } }