#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define INF 2000000000 using namespace std; int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1}; #define sym cout<<"---------"< #define P pair #define mk make_pair #define en endl #define WHITE 0 #define BLACK 2 #define GRAY 1 #define RE return 0 #define int ll int a[55]; int b[55]; vector ve; map mp; signed main(){ int n; cin>>n; for(int i=0; i>a[i]; ve.push_back(a[i]); mp[a[i]]++; } sort(ve.begin(), ve.end()); ve.erase(unique(ve.begin(), ve.end()), ve.end()); if(ve.size()==1){ if(ve[0]/(n-1)==2) cout<