from typing import List, Tuple, Callable, TypeVar, Optional
import sys
import itertools
import heapq
import bisect
import math
from collections import deque, defaultdict
from functools import lru_cache, cmp_to_key

input = sys.stdin.readline

if __file__ != 'prog.py':
    sys.setrecursionlimit(10 ** 6)


def readints(): return map(int, input().split())
def readlist(): return list(readints())
def readstr(): return input()[:-1]


N, K, X = readints()
A = readlist()

INF = 1 << 50
dp = [0, INF]
for i in range(N):
    ndp = [None, None]
    ndp[1] = min(dp[1] + K, dp[0] + K + X)
    ndp[0] = min(dp[1] + A[i], dp[0] + A[i])
    dp = ndp
print(min(dp))