公园门票计算：成人和儿童人数组合

#include <iostream>
using namespace std;

int main() {
    for (int adult = 0; adult <= 40; adult++) {
        for (int child = 40; child >= 0; child--) {
            if (adult * 8 + child * 3 == 40) {
                cout << adult << ' ' << child << endl;
            }
        }
    }
    return 0;
}