//Author RufatM #pragma GCC optimize("Ofast") #include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> #include <ext/pb_ds/detail/standard_policies.hpp> using namespace __gnu_pbds; using namespace std; typedef long long ll; typedef pair<int,int> pii; typedef pair<ll,ll> pll; typedef vector<int> vi; typedef vector<pii> vpii; typedef vector<vector<int>> vvi; typedef vector<ll> vll; typedef vector<bool> vb; typedef vector<string> vs; typedef map<int,int> mpii; typedef map<bool,int> mpbi; #define fastio ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); #define endl '\n' #define pb push_back #define pf push_front #define eb emplace_back #define ff first #define ss second #define all(x) begin(x),end(x) #define precise(x) cout << fixed << setprecision(x); #define rall(x) rbegin(x),rend(x) #define ordered_set tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> const int MOD=1000003; const int INF=1e9; const ll LINF=1e18; const int MAXN=2005; ll add(ll a,ll b){ return (a+b)%MOD; } ll sub(ll a,ll b){ return (a-b+MOD)%MOD; } ll mul(ll a,ll b){ return (a*b)%MOD; } ll binpow(ll a,ll b){ ll res=1; while(b>0){ if(b&1){ res=mul(res,a); } a=mul(a,a); b>>=1; } return res; } ll modinv(ll a){ return binpow(a,MOD-2); } void solve(){ ll n,x; cin >> n >> x; ll cnt = 0; for(int i=0;i<n;i++){ ll p; cin >> p; cnt += x; cnt -= p; } cout << cnt+x << endl; } signed main(){ fastio; int t=1; //cin >> t; while(t--){ solve(); } }