#include <bits/stdc++.h>   enum { WHITE, GREY, BLACK };   using namespace std;   long long int inf = 1e18;   template <class T>   T gcd(T a, T b) {     return b == 0 ? a : gcd(b, a % b);   }   template <typename T>   T lcm(T a, T b) {     return a / gcd(a, b) * b;   }   template <typename T>   T last_bit(T n) {     return n & 1;   }   template <class T>   T big_mod(T n, T p, T m) {     if (p == 0) return (T)1;     T x = big_mod(n, p / 2, m);     x = (x * x) % m;     if (p & 1) x = (x * n) % m;     return x;   }   template <class T>   T modInv(T a, T m) {     T x, y;     extgcd(a, m, x, y);     x %= m;     while (x < 0) {       x += m;     }     return x;   }   template <class T>   T extgcd(T a, T b, T& x, T& y) {     if (b == 0) {       x = 1;       y = 0;       return a;     } else {       int g = extgcd(b, a % b, y, x);       y -= a / b * x;       return g;     }   }   template <class T>   T multiplication(T n, T p, T m) {     if (p == 0) return (T)0;     T x = multiplication(n, p / 2, m);     x = (x + x) % m;     if (p & 1) x = (x + n) % m;     return x;   }   template <class T>   T my_pow(T n, T p) {     if (p == 0) return 1;     T x = my_pow(n, p / 2);     x = (x * x);     if (p & 1) x = (x * n);     return x;   }   template <class T>   double getdist(T a, T b) {     return sqrt((a.x - b.x) * (a.x - b.x) + (a.y - b.y) * (a.y - b.y));   }   template <class T>   T extract(string s, T ret) {     stringstream ss(s);     ss >> ret;     return ret;   }   template <class T>   string tostring(T n) {     stringstream ss;     ss << n;     return ss.str();   }   template <class T>   T Mod(T n, T m) {     return (n % m + m) % m;   }   template <class T>   T MIN3(T a, T b, T c) {     return min(a, min(b, c));   }   template <class T>   T MAX3(T a, T b, T c) {     return max(a, max(b, c));   }   template <class T>   void print_vector(T& v) {     int sz = v.size();     if (sz) cout << v[0];     for (int i = 1; i < sz; i++) cout <<     << v[i];     cout <<   n ;   }   bool isVowel(char ch) {     ch = toupper(ch);     if (ch ==  A  || ch ==  U  || ch ==  I  || ch ==  O  || ch ==  E )       return true;     return false;   }   bool isConsonant(char ch) {     if (isalpha(ch) && !isVowel(ch)) return true;     return false;   }   template <class R>   R Josephus(R n, R k) {     R ans = 1;     for (R i = 2; i <= n; i++) ans = (ans + k - 1) % i + 1;     return ans;   }   template <class R>   R toitent_Phi2(R a) {     R result = a;     for (R i = 2; i * i <= a; i++) {       if (a % i == 0) result = result - result / i;       while (a % i == 0) a = a / i;     }     if (a > 1) result = result - result / a;     return result;   }   template <typename T>   T Angle(T x1, T y1, T x2, T y2) {     return atan(double(y1 - y2) / double(x1 - x2));   }   long long int a[102];   int main() {     cin.sync_with_stdio(false);     cin.tie();     ;     long long int T, t;     long long int i, j, k;     long long int n, m, q;     scanf( %lld , &n);     for (i = 1; i <= 2 * n; i++) {       scanf( %lld , &a[i]);     }     sort(a + 1, a + 1 + 2 * n);     long long int f = 1;     j = n;     for (i = 2 * n; i > n; i--) {       for (j = n; j >= 1; j--) {         if (a[i] <= a[j]) f = 0;       }     }     if (f)       printf( YES n );     else       printf( NO n );     return 0;   }