#include <iostream> #include <vector> #include <algorithm> #include <cmath> #include <iomanip> #include <stack> #include <algorithm> #include <string> #include <map> #include <iterator> #include <set> #include <queue> using namespace std; int main() { int N; cin>>N; long s = 0; for (int i = 0; i < N; ++i) { long A; cin>>A; s += A; } long v; cin >> v; cout << s - v << endl; return 0; }