题解 | 鸡兔同笼

#include <iostream>
using namespace std;

int main() {
    int a;
    while (cin >> a) {
        int ansMin = 0, ansMax = 0, cur = a;
        if (a % 2 == 0) {
            while (cur > 0) {
                cur -= 4;
                ansMin++;
            }
            cur = a;
            while (cur > 0) {
                cur -= 2;
                ansMax++;
            }
        }
        cout << ansMin << " " << ansMax << endl;
    }
    return 0;
}
// 64 位输出请用 printf("%lld")

这样写应该比较好理解