use proconio::input;
use std::cmp::min;

fn main(){
    input!{
        n: usize,
        k: i64,
        x: i64,
        a: [i64; n],
    }

    let mut dp = vec![[i64::MAX; 2]; n];
    for i in 0..n{
        if i == 0{
            dp[i][0] = a[i];
            dp[i][1] = k+x;
        }else{
            dp[i][0] = min(dp[i-1][0], dp[i-1][1])+a[i];
            dp[i][1] = min(dp[i-1][0]+k+x, dp[i-1][1]+k);
        }
    }

    println!("{}", min(dp[n-1][0], dp[n-1][1]));
}