A. Odd Selection

记得odd,even在每组数据记得初始化位0

#include <iostream>
using namespace std;
int n,m;
int main () {
	int T;
	cin >> T;
	while (T--) {
		int odd = 0,even = 0;
		cin >> n >> m;
		for (int i = 1;i <= n;i++) {
			int x;
			cin >> x;
			if (x & 1) odd++;
			else even++;
		}
		if (!odd) {
			cout << "No" << endl;
			continue;
		}
		odd--,m--;
		bool flag = false;
		if (m & 1) flag = true,m--;
		m -= 2*(odd/2);
		if (flag) {
			if (m <= 0) m = 1;
			else m++;
		}
		if (even >= m) cout << "Yes" << endl;
		else cout << "No" << endl;
	}
	return 0;
}