https://codeforces.com/contest/1542/problem/A

题意：读入2n个数，奇数与偶数个数相同则输出yes，否则输出no
Read in 2n numbers, odd and even numbers are the same, then output yes, otherwise output No

代码
Code:

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

int t, n, u, cnt;

int main()
{
    cin >> t;
    while(t --)
    {
        cin >> n;

        cnt = 0;
        for(int i = 1; i <= n << 1; i ++) cin >> u, cnt += (u & 1);

        if(n == cnt) cout << "Yes" << endl;
        else cout << "No" << endl;
    }
}