n, k, x = map(int, input().split())
A = list(map(int, input().split()))

dp = [0, 1 << 60]
for a in A:
    ndp = [0, 0]
    ndp[0] = min(dp[0] + a, dp[1] + a)
    ndp[1] = min(dp[0] + k + x, dp[1] + k)
    dp = ndp

print(min(dp))