N=int(input())
M=[]
for _ in range(N):M.append(int(input()))
MAX=1<<N
INF=int(1e18)
dp=[[[INF,0] for _ in range(N)] for _ in range(MAX)]
for i in range(N):dp[1<<i][i]=[M[i],M[i]]
for s in range(1,MAX):
    for frm in range(N):
        if s&(1<<frm)==0:continue
        for to in range(N):
            if s&(1<<to)==0:continue
            bs=s^(1<<to)
            if dp[bs][frm][0]==INF:continue
            cost=max(0,M[to]-(dp[bs][frm][1]%1000))
            if dp[bs][frm][0]+cost<dp[s][to][0]:
                dp[s][to][0]=dp[bs][frm][0]+cost
                dp[s][to][1]=dp[bs][frm][1]+M[to]
ans=INF
for i in range(N):ans=min(ans,dp[-1][i][0])
print(ans)