#include <tuple>
#include <vector>
#include <iostream>
using namespace std;
int main() {
    int n; cin >> n;
    long long k, x; cin >> k >> x;
    vector<int> a(n);
    for (int i = 0; i < n; i++) cin >> a[i];

    long long s = x, t = 0;
    for (int i = 0; i < n; ++i) {
        tie(s, t) = make_pair(min(s + k, t + k + x), min(s, t) + a[i]);
    }
    cout << min(s, t) << '\n';
}