题解 | 鸡兔同笼

#include <bits/stdc++.h>
using namespace std;

int main(){
    int a;
    while(cin>>a){
        if(a%2==1){cout<<"0 0"<<endl;continue;}
        int min=a/4+(a%4)/2;
        int max=a/2;
        cout<<min<<" "<<max<<endl;
    }
}

把特殊情况pass掉就可以了