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

a = list(map(int,input().split()))
dp = [0, x]
for v in a:
    e = [0,0]
    e[0] = min(dp[0] + v, dp[1] + v)
    e[1] = min(dp[0] + k + x, dp[1] + k)
    dp = e
print(min(dp))