import sys
input = sys.stdin.readline

N, K, X = map(int, input().split())
A = list(map(int, input().split()))
dp = [[10**18]*2 for _ in range(N+1)]
dp[0][0] = 0

for i in range(N):
    dp[i+1][0] = min(dp[i][0]+A[i], dp[i][1]+A[i])
    dp[i+1][1] = min(dp[i][0]+X+K, dp[i][1]+K)

print(min(dp[N]))