题解 | #鸡兔同笼#

#include <iostream>

using namespace std;
int minCal(int feet) {
    int min = feet / 4;
    if (feet % 4 == 2) min++;
    return min;
}
int main() {
    int feet;
    while (scanf("%d", &feet) != EOF) {
        int max, min;
        if (feet % 2 == 1) {
            min = 0, max = 0;
        } else {

            max = feet / 2;
            min = minCal(feet);


        }
        cout << min << " " << max;
    }
    return 0;
}