#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef vector<ll> vll; typedef vector<vll> vvll; typedef pair<ll,ll> P; typedef string str; typedef vector<P> vp; typedef vector<string> vs; typedef vector<bool> vb; const ll mod=1e9+7; const ll inf=1e16; #define rep(i,m,n) for(ll i=m;i<n;i++) #define repr(i,m,n) for(ll i=m-1;i>=n;i--) #define fi first #define se second #define chmax(x,y) x=max(x,y) #define chmin(x,y) x=min(x,y) #define eb(x) emplace_back(x) #define pb(x) pop_back(x) #define all(x) x.begin(),x.end() #define allr(x) x.rbegin(),x.rend() #define sum(x) accumulate(all(x),0) #define pc(x) __builtin_popcount(x) #define gll greater<ll>() void solve(){ ll n; cin >> n; ll ans=0; rep(i,0,n) { ll a; cin >> a; ans+=a; } ll v; cin >> v; cout <<ans-v <<endl; } int main(){ cin.tie(nullptr); ios::sync_with_stdio(false); solve(); }