func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = (1 << 30);   const double eps = 1e-9;   const int mod = 1000000007;   const int MAXN = int(1e5) + 100;   const int dx[] = {-1, +1, 0, 0};   const int dy[] = {0, 0, -1, +1};   int main() {     ios::sync_with_stdio(false);     int n;     cin >> n;     vector<int> arr(n);     for (int i = (0); i < int(n); ++i) {       cin >> arr[i];     }     sort((arr).begin(), (arr).end());     for (int i = (1); i < int(n); ++i) {       int x = arr[i - 1];       int y = arr[i];       if (x == y) continue;       if (y < x * 2) {         cout <<  YES  << endl;         return 0;       }     }     cout <<  NO  << endl;     return 0;   }   