#include <iostream> #include <vector> #include <algorithm> #define int long long using namespace std; vector<int> a; signed main() { int n; cin >> n; for (int i = 0; i < n; i++) { int x; cin >> x; a.push_back(x); } sort(a.begin(), a.end()); int ma(a[0]), mi(a[n - 1]); for (int i = 1; i < n; i++) ma = ma * a[i] + 1; for (int i = n - 2; i >= 0; i--) mi = mi * a[i] + 1; cout << ma - mi; }