N,K,X = map(int, input().split())
A = [0]+list(map(int, input().split()))
dp = [[N for _ in range(2)] for _ in range(N+1)]
dp[1][0] = A[1]
dp[1][1] = X+K
for i in range(2,N+1):
    dp[i][0] = min(dp[i-1][0]+A[i],dp[i-1][1]+A[i])
    dp[i][1] = min(dp[i-1][0]+X+K,dp[i-1][1]+K)
print(min(dp[N][0], dp[N][1]))