import time
import random

t1=time.time()
N=int(input())
A=list(map(int,input().split()))
ans=0
for i in A:
    ans+=i
ans-=A[-1]
ans+=A[-1]%A[0]
pos={0}
while time.time()-t1<1.5:
    lf=random.choice(list(pos))
    ri=random.randint(0,N-1)
    while lf==ri:
        ri=random.randint(0,N-1)
    pre=ans
    new=ans
    used={(lf-1)%N,lf,(ri-1)%N,ri}
    for i in used:
        new-=A[i]%A[(i+1)%N]
    A[lf],A[ri]=A[ri],A[lf]
    for i in used:
        new+=A[i]%A[(i+1)%N]
    if pre>new:
        A[lf],A[ri]=A[ri],A[lf]
    else:
        ans=new
        if A[lf-1]<A[lf]:
            pos.add((lf-1)%N)
        else:
            pos.discard(lf-1)
        if A[ri-1]<A[ri]:
            pos.add((ri-1)%N)
        else:
            pos.discard(ri-1)
        if A[lf]<A[(lf+1)%N]:
            pos.add(lf)
        else:
            pos.discard(lf)
        if A[ri]<A[(ri+1)%N]:
            pos.add(ri)
        else:
            pos.discard(ri)
print(ans)