import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
M=[int(input()) for _ in range(n)]
inf=float("inf")
P=[inf]*(2**n)
P[0]=0
for i in range(2**n):
  k=P[i]//(10**3)
  d=P[i]%(10**3)
  for j in range(n):
    if i&(1<<j)==0:
      P[i|(1<<j)]=min(P[i|(1<<j)],(k+max(0,M[j]-d))*(10**3)+(d+M[j])%(10**3))
print(P[2**n-1]//10**3)