N,K,X = map(int,input().split())

A = list(map(int,input().split()))

inf = 10 ** 18
dp = [[inf] * 2 for _ in range(N + 1)]
dp[0][0] = 0
for i in range(N):
    a = A[i]
    if dp[i][1] != inf:
        dp[i + 1][1] = min(dp[i + 1][1],dp[i][1] + K)
        dp[i + 1][0] = min(dp[i + 1][0],dp[i][1] + a)
    dp[i + 1][1] = min(dp[i + 1][1],dp[i][0] + K + X)
    dp[i + 1][0] = min(dp[i + 1][0],dp[i][0] + a)
print(min(dp[-1]))