func_code_string: #include<bits/stdc++.h>      #define For(i, x, n) for(int i = x; i < n; i++)   #define ROF(i,x,n) for(int i = n - 1; i >= x; i--)      #define IOS ios::sync_with_stdio(false); cin.tie(0); cout.tie(0)   #define F first   #define S second   #define pb push_back   #define po pop_back   #define mp make_pair   #define En endl   ///#define endl   n       #define ALL(x) x.begin(), x.end()      using namespace std;      typedef double db;   typedef long long LL;   typedef string str;   typedef pair<int, int> PII;   typedef pair<LL, LL> PLL;      typedef vector<int> VI;   typedef vector<LL> VLL;   typedef vector<bool> VB;   typedef vector<char> VC;   typedef vector<PII> VPII;   typedef vector<string> VSTR;   typedef set<int> SI;   typedef set<LL> SLL;   typedef set<PII> SPII;      typedef const int CI;   typedef const long long CLL;      /// CI MAX_N = ;   CI MOD = 1e9 + 7;      int t, n, a;      int main () {       IOS;       cin >> t;       while (t--) {           cin >> n;           int sumz = 0;           int sumf = 0;           For (i, 0, 2 * n) {               cin >> a;               if (a % 2 == 0) sumz++;               else sumf++;           }           if (sumz == sumf) cout <<  YES  << En;           else cout <<  NO  << En;       }   }      