#include #include #include #include #include #include #include #include #include #include #include #include #include #define p(s) cout<<(s)<=n;i--) #define CK(n,a,b) ((a)<=(n)&&(n)<(b)) #define F first #define S second typedef long long ll; using namespace std; const int mod = 1e9+7; int N; int a[55]; int kame, tsuru; int main(){ cin>>N; REP(i, 0, N){ cin>>a[i]; } sort(a, a+N); int cnt=-1; REP(i,0,N){ if(a[i]!=a[0]){ cnt=i; break; } } if(cnt==-1){ if(a[0]==4*(N-1)){ cout<<0<<" "<