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

constexpr int64_t inf = 1e18;

int main() {
    int n, k, x;
    cin >> n >> k >> x;
    vector<int64_t> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a.at(i);
    }

    vector<int64_t> dp0(n + 1, inf), dp1(n + 1, inf);
    dp0.at(0) = 0;
    for (int i = 0; i < n; i++) {
        dp0.at(i + 1) = min(dp0.at(i), dp1.at(i)) + a.at(i);
        dp1.at(i + 1) = min(dp0.at(i) + k + x, dp1.at(i) + k);
    }

    cout << min(dp0.back(), dp1.back()) << endl;

    return 0;
}