#include <bits/stdc++.h>
using namespace std;
long long power(long long x, long long y);
long long mpower(long long x, long long y, long long p);
long long modInv(long long a, long long m);
long long gcdExtended(long long a, long long b, long long *x, long long *y);
bool isPrime(long long n);
bool findPartiion(vector<long long> arr, long long n) {
  long long sum = 0;
  long long i, j;
  for (i = 0; i < n; i++) sum += arr[i];
  if (sum % 2 != 0) return false;
  bool part[sum / 2 + 1][n + 1];
  for (i = 0; i <= n; i++) part[0][i] = true;
  for (i = 1; i <= sum / 2; i++) part[i][0] = false;
  for (i = 1; i <= sum / 2; i++) {
    for (j = 1; j <= n; j++) {
      part[i][j] = part[i][j - 1];
      if (i >= arr[j - 1])
        part[i][j] = part[i][j] || part[i - arr[j - 1]][j - 1];
    }
  }
  return part[sum / 2][n];
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long t, i, j, k, l, h, p, q, r, x, y, z, a, b, c, d, f, n, m,
      M = 1000000007;
  char ch, ch2, ch3;
  string s, s1, s2, s3;
  cin >> t;
  while (t--) {
    vector<long long> v, w, vv;
    unordered_map<long long, long long> N;
    set<long long> S, SS;
    cin >> n;
    m = 2 * n;
    long long A[m];
    for (i = 0; i < m; i++) {
      cin >> A[i];
    }
    c = 1;
    x = A[0];
    for (i = 1; i < m; i++) {
      if (A[i] < x) {
        c++;
      } else {
        v.push_back(c);
        x = A[i];
        c = 1;
      }
    }
    v.push_back(c);
    if (findPartiion(v, v.size())) {
      cout << "YES\n";
    } else {
      cout << "NO\n";
    }
  }
  return 0;
}
long long modInv(long long a, long long m) {
  long long x, y;
  long long g = gcdExtended(a, m, &x, &y);
  long long res = (x % m + m) % m;
  return res;
}
long long gcdExtended(long long a, long long b, long long *x, long long *y) {
  if (a == 0) {
    *x = 0, *y = 1;
    return b;
  }
  long long x1, y1;
  long long gcd = gcdExtended(b % a, a, &x1, &y1);
  *x = y1 - (b / a) * x1;
  *y = x1;
  return gcd;
}
long long mpower(long long x, long long y, long long p) {
  long long res = 1;
  x = x % p;
  while (y > 0) {
    if (y & 1) res = (res * x) % p;
    y = y >> 1;
    x = (x * x) % p;
  }
  return res;
}
long long power(long long x, long long y) {
  long long res = 1;
  while (y > 0) {
    if (y & 1) res = res * x;
    y = y >> 1;
    x = x * x;
  }
  return res;
}
bool isPrime(long long n) {
  if (n <= 1) return false;
  if (n <= 3) return true;
  if (n % 2 == 0 || n % 3 == 0) return false;
  long long p = sqrt(n);
  for (long long i = 5; i <= p; i = i + 6)
    if (n % i == 0 || n % (i + 2) == 0) return false;
  return true;
}
