def solve():
    N,K,X=map(int,input().split())
    A=["*"]+list(map(int,input().split()))

    inf=float("inf")
    DPt=[inf]*(N+1); DPf=[inf]*(N+1)
    DPf[0]=0

    for day in range(1,N+1):
        DPt[day]=min(DPt[day-1]+K, DPf[day-1]+X+K)
        DPf[day]=min(DPt[day-1]+A[day], DPf[day-1]+A[day])
    return min(DPt[N], DPf[N])

#==================================================
print(solve())