#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>

using namespace std;
using i64 = long long;
#define rep(i,n) for(int i=0; i<(int)(n); i++)

int main(){
    ios::sync_with_stdio(false); cin.tie(nullptr);
    i64 N, K, X; cin >> N >> K >> X;
    i64 dp0 = 0;
    i64 dp1 = X;
    rep(i,N){
        i64 a; cin >> a;
        i64 a0 = min(dp0, dp1) + a;
        i64 a1 = min(dp0 + X, dp1) + K;
        dp0 = a0;
        dp1 = a1;
    }
    cout << min(dp0, dp1) << endl;
    return 0;
}