// 

#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;

using ll = long long;

#define rep(i, n) for (int i=0; i<(int)(n); ++(i))
#define rep3(i, m, n) for (int i=(m); (i)<(int)(n); ++(i))
#define repr(i, n) for (int i=(int)(n)-1; (i)>=0; --(i))
#define rep3r(i, m, n) for (int i=(int)(n)-1; (i)>=(int)(m); --(i))
#define all(x) (x).begin(), (x).end()

const ll LINF = (ll)(1e18);

int main() {
	int n, k, x;
	cin >> n >> k >> x;
	vector<int> a(n);
	rep(i, n) cin >> a[i];
	vector<vector<ll>> dp(2, vector<ll>(2, LINF));
	dp[0][0] = 0;
	rep(i, n) {
		dp[(i+1)%2][0] = min(dp[i%2][0], dp[i%2][1]) + a[i];
		dp[(i+1)%2][1] = min(dp[i%2][0]+x+k, dp[i%2][1]+k);
	}
	ll res = min(dp[n%2][0], dp[n%2][1]);
	cout << res << endl;
	return 0;
}