// Enjoy your stay. Code by evima #include #define LOOPVAR_TYPE long long #define all(x) (x).begin(), (x).end() #define sz(x) ((LOOPVAR_TYPE)(x).size()) #define foreach(it, X) for(__typeof((X).begin()) it = (X).begin(); it != (X).end(); it++) #define GET_MACRO(_1, _2, _3, NAME, ...) NAME #define _rep(i, n) _rep2(i, 0, n) #define _rep2(i, a, b) for(LOOPVAR_TYPE i = (LOOPVAR_TYPE)(a); i < (LOOPVAR_TYPE)(b); i++) #define rep(...) GET_MACRO(__VA_ARGS__, _rep2, _rep)(__VA_ARGS__) template bool chmin(T &a, const T &b) { return (b < a) ? (a = b, true) : false; } template bool chmax(T &a, const T &b) { return (a < b) ? (a = b, true) : false; } #define fir first #define sec second #define mp make_pair #define mt make_tuple #define pb push_back #define eb emplace_back const double EPS = 1e-9; const double PI = 3.141592653589793238462; const long long INF = 1070000000LL; const long long MOD = 998244353LL;// 1000000007LL; using namespace std; using ld = long double; using ll = long long; int N, X, S[200010]; int main() { cin.tie(NULL); ios_base::sync_with_stdio(false); cin >> N >> X; rep(i, N) cin >> S[i]; cout << reduce(S, S + N) - X * (N - 1) << endl; }